"What's My Name?" supplants Ke$ha's "We R Who We R," which dips to No. 5 after launching atop the survey last week. The song falls 1-2 on Digital Songs (220,000, down 21%), though it advances 49-29 (35.3 million, up 45%) on Radio Songs.
Nos. 2 through 4 remain static on the Hot 100 from last week: Far*East Movement's "Like a G6," featuring Cataracs & Dev (No. 2), Bruno Mars' "Just the Way You Are" (No. 3) and Rihanna's second track in the top five, "Only Girl (In the World)" (No. 4).
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Both Rihanna songs appear on her fifth studio album, "Loud," due Tuesday (Nov. 16).
"What's My Name?" marks Rihanna's eighth career Hot 100 No. 1 and third this year. She previously reigned in 2010 with "Rude Boy" (five weeks, beginning in March) and as a guest on Eminem's "Love the Way You Lie" (seven weeks, starting in July).
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Rihanna is the first artist to score a trio of Hot 100 leaders in a year since she achieved the feat in 2008, when she ruled with her own "Take a Bow" and "Disturbia" and added vocals to T.I.'s "Live Your Life."
"What's My Name?" is Drake's first Hot 100 No. 1 among 23 chart visits.