Tila Tequila Engaged to Casey Johnson!

Tila Tequila is claiming that she's engaged to Johnson & Johnson heiress Casey Johnson.

She announced her engagement to Casey Johnson Wednesday morning in a bizarre USTREAM video.

"We have an announcement," the 27-year-old MTV reality star, clad in black lingerie, began. "...So are you ready for this big announcement that's going to change our lives?"

"This is exclusive and going to be all over the news tomorrow, but because I love you guys so much, we are giving you the exclusive first -- Tila army fans -- tonight, my girlfriend has asked me to marry her!"

Tila then showed off a huge diamond ring that Casey apparently bought for her. She said the ring is a "17-carat diamond ring from my baby. It's so fat you can't even see it! So yeah, my baby got me this 17-carat ring. My baby takes care of me. Beat that J.Lo! Beat that Khloe and Lamar! Casey Johnson and Miss Tila Tequila are officially engaged. Woo!"

Socialite Casey Johnson was arrested for grand theft in Los Angeles last week. The madcap Band-Aid heiress made headlines earlier this year after she lit her ex-girlfriend, Courtenay Semel's hair on fire following a vicious catfight.