With a 2-1 advance for "If It's Love," Train collects the 100th No. 1 title in the 14-year history of Billboard's Nielsen BDS-based Adult Pop Songs chart.

The survey premiered in the Billboard issue dated March 16, 1996, as an offshoot of the Adult Contemporary chart, a staple of the magazine since 1961.

"Recent years have seen 'hot AC' or 'adult top 40' stations introduce new modern rock, dance and R&B into their ranks," wrote then-Billboard adult chart manager Steve Graybow upon the Adult Pop Songs list's introduction. "While (adult contemporary and adult pop) still share many acts and records, each format has developed its own distinct personality."

Since its inception, the two formats have continued to exhibit notable differences. Goo Goo Dolls (13), matchbox twenty (12), John Mayer, Nickelback (11 each) and Sheryl Crow (10) - all rock-based acts - have totaled the most top 10s on Adult Pop Songs. In the same span, with lighter fare, Celine Dion (13), Jim Brickman (12), Backstreet Boys, Faith Hill and Elton John (10 each) have tallied the most Adult Contemporary top 10s.

In the Adult Pop Songs archives, Nickelback boasts the most No. 1s, with five. With its latest leader, Train ties Daughtry, matchbox twenty and Rob Thomas (separately, as a solo act) for second-most No. 1s (four).

Train previously reigned with "Drops of Jupiter (Tell Me)" (14 weeks, 2001), "Calling All Angels" (five weeks, 2003) and "Hey, Soul Sister" (six weeks, 2010). The band's first No. 1 retains the record for most weeks spent on the survey: 75, between February 2001 and July 2002.

With two No. 1s in 2010, Train is the first act to ascend to No. 1 twice in the same year since Daughtry in 2007.

"The Adult Pop Songs chart is very valuable," says Pete Cosenza, senior  VP/promotion, adult formats, at Train's label, Columbia Records. "It continues to be a place that highlights the power of pop music for adults.

"The chart also shows the variety of music that appeals to adults. You can see how so many of the format's hit songs and artists are a big part of pop culture."

In honor of the survey's milestone No. 1, here is a look at the 100 Adult Pop Songs chart champions. While early No. 1s included adult contemporary-leaning acts such as Mariah Carey, Dion and Eric Clapton, the Lilith Fair boom of the late '90s (Jewel, Paula Cole, Sarah McLachlan) ushered in a rockier era (3 Doors Down, the Fray, Coldplay) that has embodied the chart's core sound since.


1996
 1 "One Sweet Day" Mariah Carey & Boyz II Men (the only duet to top the chart)
 2 "Time" Hootie & the Blowfish
 3 "Because You Loved Me" Celine Dion
 4 "Give Me One Reason" Tracy Chapman
 5 "Change the World" Eric Clapton
 6 "I Love You Always Forever" Donna Lewis
 7 "Head Over Feet" Alanis Morissette

 8 "Don't Speak" No Doubt


1997
 9 "You Were Meant for Me" Jewel
 10 "One Headlight" the Wallflowers
 11 "Sunny Came Home" Shawn Colvin
 12 "All for You" Sister Hazel
 13 "Foolish Games" Jewel
 14 "I Don't Want to Wait" Paula Cole
 15 "Tubthumping" Chumbawamba


1998
 16 "Walkin' on the Sun" Smash Mouth
 17 "3 AM" matchbox 20 (the first of Rob Thomas' eight trips to No. 1, the most of any artist's combined solo and group careers)
 18 "Torn" Natalie Imbruglia
 19 "Iris" Goo Goo Dolls
 20 "Thank U" Alanis Morissette
 21 "Lullaby" Shawn Mullins


1999
 22 "Angel" Sarah McLachlan
 23 "Slide" Goo Goo Dolls
 24 "Every Morning" Sugar Ray
 25 "Livin' La Vida Loca" Ricky Martin
 26 "All Star" Smash Mouth

 27 "She's So High" Tal Bachman
 28 "Smooth" Santana featuring Rob Thomas (longest command - 25 weeks - in the chart's history)


2000
 29 "Everything You Want" Vertical Horizon
 30 "Breathe" Faith Hill
 31 "Bent" matchbox twenty
 32 "With Arms Wide Open" Creed
 33 "If You're Gone" matchbox twenty


2001
 34 "Thank You" Dido
 35 "Follow Me" Uncle Kracker
 36 "Hanging by a Moment" Lifehouse
 37 "Drops of Jupiter (Tell Me)" Train
 38 "Only Time" Enya
 39 "Superman (It's Not Easy)" Five for Fighting
 40 "Wherever You Will Go" the Calling (the longest domination for an act's debut single, and second-longest overall - 23 weeks)


2002
 41 "Soak Up the Sun" Sheryl Crow
 42 "Complicated" Avril Lavigne (the longest reign by a female artist - 16 weeks)

 43 "The Game of Love" Santana featuring Michelle Branch


2003
 44 "I'm With You" Avril Lavigne
 45 "Unwell" matchbox twenty
 46 "Calling All Angels" Train
 47 "Why Don't You & I" Santana featuring Alex Band or Chad Kroeger
 48 "Here Without You" 3 Doors Down


2004
 49 "The First Cut Is the Deepest" Sheryl Crow
 50 "Someday" Nickelback
 51 "My Immortal" Evanescence
 52 "This Love" Maroon 5
 53 "The Reason" Hoobastank
 54 "She Will Be Loved" Maroon 5
 55 "Daughters" John Mayer


2005
 56 "Give a Little Bit" Goo Goo Dolls
 57 "Boulevard of Broken Dreams" Green Day

 58 "Lonely No More" Rob Thomas
 59 "You and Me" Lifehouse
 60 "Behind These Hazel Eyes" Kelly Clarkson (the first of six No. 1s by "American Idol" finalists)
 61 "Photograph" Nickelback


2006
 62 "You're Beautiful" James Blunt
 63 "Bad Day" Daniel Powter (the longest rule by a lead male artist - 12 weeks)
 64 "Black Horse & the Cherry Tree" KT Tunstall
 65 "Crazy" Gnarls Barkley
 66 "Far Away" Nickelback
 67 "How to Save a Life" the Fray


2007
 68 "Chasing Cars" Snow Patrol
 69 "It's Not Over" Daughtry
 70 "If Everyone Cared" Nickelback
 71 "Home" Daughtry
 72 "Hey There Delilah" Plain White T's
 73 "Big Girls Don't Cry" Fergie
 74 "Who Knew" Pink
 75 "Bubbly" Colbie Caillat


2008
 76 "Apologize" Timbaland featuring OneRepublic
 77 "Love Song" Sara Bareilles
 78 "Feels Like Tonight" Daughtry
 79 "Bleeding Love" Leona Lewis
 80 "It's Not My Time" 3 Doors Down
 81 "Viva La Vida" Coldplay
 82 "I'm Yours" Jason Mraz
 83 "So What" Pink

 84 "Hot N Cold" Katy Perry


2009
 85 "Gotta Be Somebody" Nickelback
 86 "You Found Me" the Fray
 87 "Sober" Pink (the only artist to link three consecutive No. 1s)
 88 "Gives You Hell" the All-American Rejects
 89 "Second Chance" Shinedown
 90 "Her Diamonds" Rob Thomas
 91 "No Surprise" Daughtry
 92 "Use Somebody" Kings of Leon
 93 "Already Gone" Kelly Clarkson


2010
 94 "Fireflies" Owl City
 95 "Someday" Rob Thomas
 96 "Hey, Soul Sister" Train
 97 "Need You Now" Lady Antebellum (song set the record for most weekly plays - 4,129 - according to Nielsen BDS)
 98 "Breakeven" the Script
 99 "California Gurls" Katy Perry
 100 "If It's Love" Train