Katy Perry Debuts at #1 on Billboard with "Part of Me"

Katy Perry's "Part of Me" rockets in at the Billboard Hot 100 summit, while Adele, the late Whitney Houston, Nicki Minaj and Chris Brown all make notable news in the chart's top 10.

Following her appearance at the 54th Grammy Awards on Feb. 12, Perry, who performed "Part" in a medley with her former No. 1 "E.T.," engineers just the 20th No. 1 entrance in the Hot 100's 53-year history. Lady Gaga had last stormed in at the chart's top spot almost a year ago (Feb. 26, 2011) with "Born This Way," which also benefitted from Grammys exposure last year; "Born" reached retail and radio the Friday before last year's event, at which Gaga sang it.

"Part" marks the first start at the pinnacle for a single on the storied Capitol Records label. The song is Perry's seventh career Hot 100 No. 1.

After Capitol released it to radio and retail on Feb. 13, "Part," the lead single from Perry's "Teenage Dream" deluxe edition, "The Complete Confection" (due March 27), blasts in atop the Hot 100 and Digital Songs with 411,000 downloads sold, according to Nielsen SoundScan, marking Perry's best career sales week. On Radio Songs, "Part" launches at No. 36 with 35 million audience impressions, according to Nielsen BDS.

"Confection" picks up where the original version of "Dream" left off: producing a Hot 100 No. 1. Dream matched Michael Jackson's Bad (1987-88) by tallying five Hot 100 leaders, the most toppers from a single album over one release in the chart's archives.