Selena Gomez stunned at MTV's Video Music Awards Sunday night!

The singer was on hand to co-host the awards pre-show. She told MTV's Sway that she had done her research for interviewing the stars, and she was particularly excited to interview Nicki Minaj!

Selena, 19, and MTV VJ Sway talked to Demi Lovato, with Selena calling Demi one of her best friends. And boyfriend Justin Bieber gave Selena a big kiss!

Miley Cyrus showed up at the MTV Video Music Awards Sunday night in a full-length, leopard-and-floral print gown by Roberto Cavalli.

She finished off her look with Lorraine Schwartz jewels and Azzedine Alaia shoes. Sometimes we can't believe Miley's only 18 -- she looks so grown up!

The singer presented the Best Rock Video award with skateboarder Shaun White at the awards show.

The awards are held at LA Live in downtown Los Angeles. So far, the cast of Jersey Shore, Selena Gomez, Amber Rose and Wiz Khalifa have shown up!

Justin Bieber hit the VMAs on Sunday night with a friend on his arm -- his snake, Johnson!

No word yet on why the Biebs brought his snake, but he did stop and say hello to girlfriend Selena Gomez, who co-hosted the pre-show. She called him "babe," and he gave her a big kiss ... on the cheek!

Stay with X17 online for all the pics and latest news from the VMAs!

Demi Lovato wow-ed the crowd at the MTV Video Music Awards Sunday night. The starlet, who's in the middle of a major comeback after her stints in rehab, looked amazing!

Demi talked to MTV's Sway and bff Selena Gomez at the pre-show about her new album, revealing that her favorite part was working with one of her favorite stars -- Missy Elliott!

Beyonce showed up at MTV's VMAs on Sunday with a surprise -- but it wasn't a surprise performance!

The singer, 29, lovingly caressed her baby bump on the black carpet -- revealing that she is pregnant!

This is the first child for Beyonce and her husband of three years, 41-year-old Jay-Z, who performed "Otis" at the VMAs with Kanye West.

In June, Beyonce told Piers Morgan, "I always said I would have a baby at 30." She turns 30 Sept. 4.

Beyonce looks amazing holding her growing baby belly! Congrats to the happy couple!

Video Music Award nominee Adele sported some big hair and a mod-inspired, geometric look at MTV's VMAs on Sunday!

We love how retro -- and talented -- Adele is! Britney Spears said she was "very excited" to see the singer.

The cast of Jersey Shore were the real stars of the night at MTV's Video Music Awards. They were everywhere! First, a new episode of the show aired before the awards show ... a violent episode featuring The Situation slamming his own head into a wall!

Interestingly, he didn't show up for the VMAs.

The cast was also interviewed on the black carpet, and a video of them talking about their favorite nominees aired during the pre-show. In it, the cast learned a lot -- including that Adele is a woman and that the word "bass" does not mean the fish. Yay!

Her enemy Pitbull may have invited Lindsay to the Video Music Awards today, but we're guessing she didn't accept his invitation. Question is, was she invited anyway, by someone else?

We spotted Lindsay arriving home at her Venice Beach abode Saturday. Maybe she went for a fitting? Some last-minute tailoring on a dress for the big night?