Katy Perry Ties For Most Mainstream Top 40 No. 1s

Katy Perry's "Roar" blasts 5-1 on Billboard's Nielsen BDS-based Mainstream Top 40 radio airplay chart. With the coronation, which dethrones Robin Thicke's "Blurred Lines" (featuring T.I. and Pharrell) after 10 weeks on top, Perry matches Rihanna for the most No. 1s –- 10 –- in the chart's 21-year history. P!nk follows with nine toppers.

At just six weeks, "Roar" marks the fastest flight to the Mainstream Top 40 summit since "California Gurls" (featuring Snoop Dogg), the lead single from Perry's last album, 2010's Teenage Dream, also soared to the top spot in its sixth frame the week of July 3, 2010. ("Roar" makes the largest leap to No. 1 since "Gurls" logged an identical 5-1 jump.) "Roar" previews Perry's new album Prism, due Oct. 22.

Having now done so twice, Perry is the only act to send a song to No. 1 in as few as six weeks in more than eight years; prior to "Gurls," no song had reached the apex so swiftly since Gwen Stefani's "Hollaback Girl" (six weeks, 2005).

Also notable: As Capital Cities climb 3-2 with "Safe and Sound," Capitol Records boasts the Mainstream Top 40 chart's top two titles. Interscope had monopolized the top two for a record seven straight weeks through last week; as "Blurred Lines" reigned, Thicke's labelmates Imagine Dragons ("Radioactive"), Maroon 5 ("Love Somebody") and Zedd ("Clarity") peaked at No. 2.

Here is an updated list of the acts with the most No. 1s dating to the Mainstream Top 40 chart's Oct. 3, 1992, launch:

10, Katy Perry
10, Rihanna
9, P!nk
7, Lady Gaga
7, Britney Spears
6, Beyonce
6, Mariah Carey
6, Maroon 5
6, Bruno Mars
6, Justin Timberlake

"Roar" has spent the last two weeks atop the all-format airplay/sales/streaming Billboard Hot 100 chart (where it's Perry's eighth leader). The song could get dethroned this week, however, by Miley Cyrus' "Wrecking Ball." As "Roar" takes over atop Mainstream Top 40, "Ball" swings onto the list at No. 35.

Thanks to its expected monster streaming and sales sums, "Ball" looks likely to top the Hot 100 this week. Check Billboard.com on Wednesday (Sept. 18) to see if the song does its name justice and knocks "Roar" from the chart's coveted top spot.

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