Demi Lovato to Walk Down the Aisle

OK, so Demi Lovato isn't getting married, but her friend and former Sonny With A Chance co-star Tiffany Thornton is getting hitched soon, and she tells that Demi will be one of the bridesmaids walking down the aisle on her special day. "Demi is one of my bridesmaids!" said the 25-year-old Thornton. "We go way back. She's like a little sister to me. She's one of my closest friends." 

According to People, Thornton was one of Demi's biggest supporters while the Disney star was in rehab for physical and emotional issues, often sending her text messages and tweets. "We hang out a lot, we talk about our faith. I just really enjoy spending time with her," Thornton added. 

Thornton, who met Demi in 2009 when they started working together on Sonny With A Chance, said she knew Demi was having a hard time before the 18-year-old star checked herself into rehab. "You could tell she was always tired," she said. "She works more than any person I have ever known in my entire life." 

And even though Thornton says she'll miss working with Demi on the show — since Demi recently quit the show to work on her music — she says Demi has a lot of courage. "I'm really proud of her. It takes a lot of guts to admit that you aren't perfect in front of the world," she said.