A-list Instagram pics of the week

This week has been a busy world in celebrity land.

For starters, Ellie Goulding snapped a selfie with Elton John at last night's AIDS foundation event, which he hosts every year at his Berkshire home with his partner David Furnish.

But they weren't the only celebrities to be seen hanging out together. Miley Cyrus was with Karl Lagerfeld, Gwen Stefani took a shot of her and Roger Federer at the U.S. Open, and Cara Delevinge, Rita Ora and Jourdan Dunn were spending time together at the GQ awards. See we told you it had been a busy week.

Jessica Alba shared a sweet picture of her and her husband, Cash Warren, from 2006, but the cutest picture of the week easily goes to Jessica Simpson, who posted a photo of her daughter Maxi applying make up on her.

Rather shamelessly, our favourite picture of the week has to go to Jared Leto, with a towel wrapped around his head, while showing off his brilliant yoga moves. That's the only thing we're looking at, honest.