World's best birthday present?

One day after celebrating her birthday Colbie Caillat, 30, announced her engagement Friday to Justin Young, 36. "This sweet man asked me to be his lobster...and I said yes," she captioned the photo of she and Young relaxing on a boat.

This sweet man asked me to be his lobster....and I said yes :) #colbieandchristina

A photo posted by Colbie Caillat (@colbiecaillat) on

In an earlier photo posted from "windy Bermuda," Caillat is already sporting her new bling.

The couple have been dating since 2009 and are currently touring together on Caillat's "The Girls Night Out, Boys Can Come Too" tour." Young is the lead guitarist in her band and has also been her musical director.

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"We feel very lucky that we get to go on tour with each other rather than other people who have to leave their significant others at home," the signer told Billboard back in 2011. "It's really special. It's like having your best friend everywhere with you."

This gives her song "I Do" to a whole new meaning.

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