'Grenade' tops U.S. record chart

LOS ANGELES, Jan. 27 (UPI) -- Bruno Mars's "Grenade" is No.1 on the U.S. record chart, Billboard.com reported Thursday.

Coming in at No. 2 on the Billboard Hot 100 is Katy Perry's "Firework," followed by Wiz Khalifa's "Black and Yellow" at No. 3, Enrique Iglesias' "Tonight (I'm Lovin' You)" featuring Ludacris and DJ Frank E at No. 4 and Rihanna's "What's My Name?" featuring Drake at No. 5.

Rounding out the top tier are Britney Spears's "Hold It Against Me" at No. 6, Ke$ha's "We R Who We R" at No. 7, P!nk's "Raise Your Glass" at No. 8, the Black Eyed Peas's "The Time (Dirty Bit)" at No. 9 and Pitbull's "Hey Baby (Drop It to the Floor)" featuring T-Pain at No. 10.