Katy Perry's "Part of Me" rockets in at the Billboard Hot 100summit, 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.

