Ali Dumps Chris, Roberto Proposes!

Monday's Bachelorette finale was a sad night for Chris Lambton -- and a very happy one for Ali Fedotowsky and fiance Roberto Martinez!

Watch Ali give Christhe bad news -- she's in love with Martinez -- before their planned final date. "You're one of the best men I've ever been able to meet in my whole life," Fedotowsky tells Lambton. "I mean that."

Then, relive Roberto's romantic Bora Bora proposal with a dazzling Neil Lane engagement ring.

Check out the highs and lows from the surprising finale in this clip now (above)!