Katy Perry's 'Firework' Continues Reign at Hot 100

Katy Perry is continuing to light up the U.S. pop chart - her single "Firework" is at number one for a second consecutive week. The singer keeps her pal Rihanna from climbing back to the top spot with her Drake collaboration "What's My Name?" at two, while the R&B beauty lands another hit at six with "Only Girl (In the World)". Bruno Mars moves up to third place with "Grenade", while Pink's "