Demi Lovato is delighted by Kanye West's lavish proposal to Kim Kardashian.

Kanye proposed the reality star love on Monday, when Kim's turned her 33rd birthday.

"I've told Kanye before that if he doesn't treat her well, I'm going to come after him," Demi joked to E! News. The rapper ented out an entire baseball stadium in San Francisco for the proposal, hired an orchestra and presented Kim with a 15 carat diamond ring by Lorraine Schwartz.

Kim is Demi’s close friend and thinks Kim is a sweet person and she deserves luxurious things.

"I've known Kim for years and she's been such a good friend to me during some really hard times," the singer said. "She deserves that Giants stadium!"

A source recently said re to Hollywood Life that 'Kanye wanted to make Kim's birthday something she would never forget'. 'Kim is on cloud nine and couldn't have asked for anything more on her day.

'She is in a great place with her child healthy and happy, and now getting engaged seals the deal on her happiness. 'When it comes to Kanye and marrying him, her thoughts are, 'Three's a charm.''