Bruno Mars

Bruno Mars will become the third male artist this year to take his first charting single as a lead artist to No. 1 on the Billboard Hot 100, as "Just the Way You Are" will top the list to be released in full on Billboard.com tomorrow morning.

Also hitting No. 1 in 2010 with their debut solo releases were Taio Cruz with "Break Your Heart" (March) and B.o.B's "Nothin' On You" (May), with Mars providing featured vocals on the latter title.

Mars holds off a strong charge by Rihanna's "Only Girl (In the World)," which shoots 75-3 while debuting at No. 1 on Digital Songs with 249,000 first-week downloads, according to Nielsen SoundScan. Mars' "Just the Way You Are" drops 1-2 on Digital Songs with 194,000.
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