Demi Lovato

Demi Lovato

Demi Lovato thinks Selena Gomez is "amazing."

The 'Heart Attack' hitmaker, who sought treatment in rehab for an eating disorder, drug abuse and self-harming in December 2010, has voiced her support for her best friend following news the 'Come & Get It' singer spent two weeks in rehab last month.

The 21-year-old former 'The X Factor' USA judge told E! News: "Selena is... I've known her for 14 years and we've been best friends. She's amazing. I love her."

Asked how Selena is doing, Demi replied: "We're best friends but that's all of her business and I just want to let her do her thing. She's amazing, I love her."

The duo, who first met when they starred on 'Barney & Friends' as children, were spotted having dinner together at Craig's Restaurant in West Hollywood following Selena's rehab stint in late January, and Demi admitted their dinner dates are "a lot of fun."

Demi also tweeted her support for Selena, who was struggling to get over her ex-boyfriend Justin Bieber and allegedly drinking more than usual before seeking help, on Wednesday (05.02.14), writing: "Weakness is living in denial. Only the strongest people ask for help."

A representative for the 21-year-old star confirmed Selena had spent a fortnight at Arizona's Dawn at the Meadows last month, but denied she had "substance abuse" problems.