Here's what your favourite celebrities have been up to.

Kangna Ranaut poses for shutterbugs at the launch of Lawman jeans in Mumbai on Tuesday.

Actress Jessica Alba poses for photographers as she arrives at the Excelsior Palace in Venice on Tuesday.

Alba is attending the screening of her movie Machete directed by Robert Rodriguez at the opening of 67th Venice Film Festival today.

Canadian singer Justin Bieber performs at Madison Square Garden in New York on Tuesday.