Demi Lovato was dressed to impress as she hit the red carpet and the stage at a Z100-hosted shindig this weekend. The party was meant to kick off the buzz about the New York City radio station’s annual Jingle Ball, a holiday concert that boasts a killer lineup this year: Lovato (of course), Lady Gaga, Pitbull, Kelly Clarkson, David Guetta, LMFAO, Foster the People, Gym Class Heroes and Hot Chelle Rae. Kim Kardashian, Khloe Kardashian Odom, Lamar Odom and Karmin are set to appear as special guest hosts during the show, which takes place on Dec. 9.

As seen in the pictures above, Lovato looked flawless in a short and flowy white dress, sharp leather jacket, matching belt and black booties. The singer — who released her new album ‘Unbroken’ last month — topped her camera-ready outfit with a bold red lip and loose curls. She looked put together yet sassy. The biker jacket gave her classic look just enough edge, while the cherry lipstick provided a welcome splash of color to her black-and-white ensemble.

After strutting the red carpet and announcing the Z100 Jingle Ball 2011 lineup, Lovato entertained the crowd with a live performance — and judging from the huge grin seen in the pictures of her time onstage, she was loving every moment of it.

In other news about Lovato, she’s been chosen to sing the National Anthem at Game 5 of the World Series on Monday, Oct. 24. Tune in to the game tomorrow night to catch Lovato kill it, but for now, take a minute to flip through these gorgeous pictures and watch the video below of her performing ‘My Love Is Like a Star.’

Watch Demi Lovato Sing ‘My Love Is Like a Star’ at the Z100 Jingle Ball Kick Off Party