Derulo's decade-plus gap between No. 1s is long, but hardly unprecedented. Here are a dozen other artists who had to wait at least ten years between two of their Hot 100-toppers.
Mariah Carey (Apr. 12, 2008 to Dec. 21, 2019)
For a long time, it seemed like 2008's "Touch My Body," Mariah Carey's historic 18th Hot 100 No. 1, would also be her last. Her success on the chart faded over the course of the ensuing decade, and her most recent full-length album, Caution, failed to notch a single Hot 100 entry. However, Mariah was able to get back to pole position thanks to the annual holiday surge of her '90s classic "All I Want For Christmas Is You," which finally reached the top spot in December of 2019, lasting three weeks and technically securing her first No. 1 hit of both the 2010s and 2020s.
Sean Paul (Apr. 1, 2006 to Aug. 6, 2016)
Dancehall superstar Sean Paul achieved tremendous crossover success in the '00s, scoring a trio of No. 1 hits on the Hot 100 with "Get Busy" (2003), a featured appearance on Beyoncé's "Baby Boy" (2003) and "Temperature" (2006). Chart success was harder to come by for Sean Paul in the 21st century's second decade, but he still provided a reliable lift as a guest artist -- as Sia found out when he was added to her pop hit "Cheap Thrills," helping her score her first No. 1 and Paul's fourth in the summer of 2016.
Christina Aguilera (June 2, 2001 to Sept. 10, 2011)
Christina Aguilera's TRL-era stardom shot her top of the charts more regularly than any of her peers in her early years, as the teen pop sensation scored three Hot 100 No. 1s off her 1999 self-titled debut album alone, then a fourth on the all-star "Lady Marmalade" team-up (with P!nk, Mya and Lil Kim) off the Moulin Rouge soundtrack in 2001. Aguilera continued to be a regular pop presence from there, but didn't reach the top spot until her appearance on Maroon 5's "Moves Like Jagger" in 2011 -- facilitated and promoted by her and M5 singer Adam Levine's coaching gigs on the new hit TV competition The Voice.
Dr. Dre (Nov. 9, 1996 to Feb. 21, 2009)
For all of the many rap classics to Dr. Dre's name, his two Hot 100 No. 1s came with songs you probably wouldn't immediately associate with him: Blackstreet's "No Diggity," the 1996 classic for which Dre provided a rare guest verse, and Eminem's "Crack a Bottle," a 2009 collaboration with Eminem and 50 Cent that faded quickly following its No. 1 debut. (His own immortal "Nuthin' But a 'G' Thang" peaked at No. 2; 2Pac's Dre-featuring "California Love" went to No. 1 as part of a double A-side with "How Do U Want It," but only that track's guests K-Ci & JoJo were credited on the official listing.)
Cher (Mar. 23, 1974 to Mar. 13, 1999)
The longest pause in Hot 100 history between two No. 1 hits belongs to Cher, who scored one No. 1 in the '60s as part of Sonny & Cher ("I Got You Babe," 1965), then another three on her own in the early '70s ("Gypsys, Tramps & Thieves," 1971; "Half-Breed," 1973; "Dark Lady," 1974). From there, it was nearly another quarter century until her next chart-topper, courtesy of her Auto-Tuned 1999 dance-pop comeback "Believe." Cher was 52 years old at the time, making her the oldest female solo artist to ever reach the Hot 100's apex.
Rod Stewart (Feb. 10, 1979 to Jan. 22, 1994)
The '70s were the decade of Rod Stewart, as the Faces frontman scored three massive solo Hot 100 No. 1 hits: "Maggie May"/"Reason to Believe" (1971), "Tonight's the Night (Gonna Be Alright)" (1976) and "Da Ya Think I'm Sexy?" (1979). Stewart stayed prolific throughout the '80s and early '90s, scoring nine top 10 hits on his own, but wouldn't reach the top spot again until his superteaming with Bryan Adams and Sting for "All For Love," from the soundtrack to 1994's film adaptation of The Three Musketeers.
Beach Boys (Dec. 10, 1966 to Nov. 5, 1988)
Before Cher captured the all-time record, the Beach Boys had the longest gap between Hot 100 No. 1 hits with the nearly-22-year space between 1966's "Good Vibrations," final of their three '60s No. 1s, and their 1988 smash "Kokomo." Though the Cocktail soundtrack single introduced the Beach Boys to a new generation, it featured no input from longtime bandleader Brian Wilson, and marked the group's final trip to the Hot 100's top 40.
Aretha Franklin (June 3, 1967 to Apr. 18, 1987)
Despite having a catalog and career as legendary as basically any solo artist of the late 20th century, Aretha Franklin only visited the Hot 100's apex once on her own, with her classic cover of Otis Redding's "Respect" in 1967. From there, it was two decades and several career reinventions until she returned to the top spot, with help from newly minted solo megastar George Michael on the 1987 pop-soul duet "I Knew You Were Waiting (For Me)."
Dionne Warwick (Oct. 26, 1974 to Jan. 18, 1986)
While Aretha made just one visit to the Hot 100's peak on her own, Dionne never got higher than No. 2 (with "(Theme From) Valley of the Dolls" in 1968) without a co-lead. She did still reach the top spot twice, however, with Detroit-via-Philly soul greats The Spinners on 1974's "Then Came You," and then a little over a decade later along with Elton John, Gladys Knight and Stevie Wonder on the 1986 charity single "That's What Friends Are For" (credited to "Dionne & Friends").
Herb Alpert (June 22, 1968 to Oct. 20, 1979)
The most famous trumpet player of the rock era, Herb Alpert's two career Hot 100 No. 1s came with songs fairly removed from his usual instrumental jazz-pop style. In 1968, he topped the chart for the first time with a rare lead vocal on the Burt Bacharach/Hal David ballad "This Guy's in Love With You." Then, in 1979, he returned to pole position with the jazz-funk slapper "Rise," co-written and co-produced with nephew Randy "Badazz" Alpert, and later sampled for The Notorious B.I.G.'s own No. 1 smash "Hypnotize."
The Four Seasons (July 18, 1964 to Mar. 13, 1976)
After spending much of the early '60s as America's premier pop vocal group, The Four Seasons scored their fourth and final Hot 100 No. 1 of the '60s with "Rag Doll." But the group's popularity slowly faded after that, until a mid-'70s revival spurred on by frontman Frankie Valli's solo breakout ballad "My Eyes Adored You," a No. 1 in early 1975. From there, the Four Seasons resumed their own chart dominance, returning to the Hot 100's top spot with the disco-flavored "December, 1963 (Oh, What a Night)" in 1976.
Neil Sedaka (Aug. 11, 1962 to Feb. 1, 1975)
"Sedaka is back!" declared the outro to Captain and Tennille's Hot 100-besting "Love Will Keep Us Together" in 1975, and the stats certainly bore the claim about the song's co-writer out. After the Brill Building singer/songwriter hit No. 1 for the first time in 1962 with "Breaking Up Is Hard to Do," his chart success dried up shortly with the rise of rock's British Invasion. But in 1975, he roared back with a vengeance -- not only co-writing "Together," but scoring two No. 1s of his own, with the ballad "Laughter in the Rain" in February and the searing "Bad Blood" (with an assist from a red-hot Elton John) in October.
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And here are six bonus examples of artists who scored two Hot 100-toppers more than a decade apart -- once with a group, and once as a solo artist:
Bone Thugs-N-Harmony / Krayzie Bone (May 18, 1996 to June 3, 2006)
"Tha Crossroads" brought Cleveland rap group Bone Thugs-N-Harmony to the chart's apex in 1996. Ten years later, the quartet's Krayzie Bone returned as a featured artist on Houston MC Chamillionaire's lone No. 1, "Ridin."
The Police / Sting (July 9, 1983 to Jan. 22, 1994)
Shortly after scoring their first Hot 100 No. 1 with the Synchronicity ballad "Every Breath You Take," The Police imploded and frontman Sting embarked upon a successful solo career. His lone chart-topper apart from the band came with the aforementioned "All For Love," alongside Bryan Adams and Rod Stewart.
Righteous Brothers / Bill Medley (Apr. 9, 1966 to Nov. 28, 1987)
As one-half of the Righteous Brothers (with the unrelated Bobby Hatfield), Bill Medley scored a pair of '60s Hot 100 No. 1s, 1965's "You've Lost That Lovin' Feelin'" and 1966's "(You're My) Soul and Inspiration." More than 21 years after the latter, Medley topped the chart again with a new duet partner: Jennifer Warnes, on the Dirty Dancing soundtrack single "(I've Had) The Time of My Life."
Labelle / Patti LaBelle (Mar. 29, 1975 to June 15, 1986)
As part of her eponymous R&B group Labelle, Ms. Patti LaBelle topped the Hot 100 for the first time with 1975's "Lady Marmalade." Going solo by decade's end, she experienced a career revival in the mid-'80s capped by another trip to No. 1, alongside Michael McDonald for the 1986 ballad "On My Own."
Gladys Knight & The Pips / Gladys Knight (Oct. 27, 1973 to Jan. 18, 1986)
Gladys Knight scored 38 Hot 100 hits over the course of nearly three decades with backing group the Pips, but only reached the chart's apex with 1973's timeless "Midnight Train to Georgia." Apart from the Pips, Knight made one more trip to No. 1 as part of the aforementioned "That's What Friends Are For" charity single.
Manfred Mann / Manfred Mann's Earth Band (Oct. 17, 1964 to Feb. 19, 1977)
Technically, Manfred Mann topped the Hot 100 as part of two groups -- first with the poppy "Do Wah Diddy Diddy" under his eponymous band's name in 1964, then again a decade later with his new Earth Band on their cover of Bruce Springsteen's "Blinded By the Light."