Leto is back to his music-making ways during a 30 Seconds to Mars concert in Brisbane, Australia. Plus: Tom Cruise, Will Smith & more!

POP STAR'S BEST FRIEND

Kesha pals around with Sutter, the First Dog of California, at the Humane Society of the United States's 60th Anniversary Gala in Beverly Hills Saturday night, marking her first public appearance since completing rehab.