How John Legend, Chrissy Teigen and more partied in Las Vegas

How John Legend, Chrissy Teigen and more partied in Las Vegas
Model Chrissy Teigen and singer John Legend host at 1 OAK Nightclub at the Mirage during a special pre-Billboard Music Awards party. (David Becker/WireImage)

With Rock in Rio wrapping up on Saturday night and the Billboard Music Awards at the MGM Grand Garden Arena on Sunday night, Las Vegas was all about musicians over the weekend.

For singer John Legend and his wife Chrissy Teigen, that meant hosting a pre-Billboard Music Awards celebration at 1 OAK Nightclub at the Mirage on Saturday night. Earlier, Legend performed at Rock in Rio, taking over for singer Sam Smith, who bowed out with a vocal cord hemorrhage that required surgery.

No singing for Legend at 1 OAK though. The night was all about friends and champagne.

Singer and songwriter Rico Love, who has produced hit records for Beyonce, Usher and Nelly, also partied at 1 OAK.

On Friday, Legend and Teigen dined at Hakkasan at the MGM Grand. Also spotted at the modern Cantonese restaurant — British singer Rita Ora with a few friends.

At Tao Nightclub, rapper Wiz Khalifa hosted the official Billboard Music Awards pre-party at Venetian club on Saturday night. He put together a 15-minute set that kicked off with his 2014 hit "Me and You Friends," followed by "Young, Wild & Free," which had the crowd singing along to the chorus. He continued to entertain with his hits, telling the crowd, "The party don't stop when I get on stage."

Scott Hoying and Mitch Grassi from the band Pentatonix and the YouTube sensations also known as Superfruit were spotted dining  at Tao Asian Bistro as well.