Bruno Mars' "It Will Rain" dips from
#3 to #4 in its 16th week. The song also tops the 2 million mark in digital sales this week. It's Mars' seventh 2-million seller, combining lead and featured credits. The Grammy-winning "Just The Way You Are" (4,933,000) is his biggest seller, followed by "Grenade" (4,880,000), Travie McCoy's "Billionaire" (3,119,000), "The Lazy Song" (2,981,000), B.o.B's "Nothin' On You" (2,939,000) and Bad Meets Evil's "Lighters" (2,065,000).