Bruno Mars’ “Grenade” Explodes Atop Hot 100
Bruno Mars is back on top of the Billboard Hot 100 chart this week as his “Grenade” once again replaces Katy Perry’s "Firework" at number one. Mars’ “Grenade” edged "Firework" out of the top spot two weeks ago, only to have Perry's track reclaim the chart's lead spot for a fourth frame last week. Read about more artists on the Hot 100, after the jump.