LeAnn Rimes And Her Sexy Bikini Birthday Celebration!

When you best friend turns 40, this is how you celebrate!!

LeAnn Rimes is in Cabo San Lucas with girls, getting all kinds of tipsy with mariachi accompaniment! Oh, and did we mention she’s straight up in a bikini the entire time??

We ALL know that LeAnn’s got a body made for bikinis — they’re one of her favorite outfits!! Ha!

Check out the sexy and fun Vine she posted AFTER THE JUMP!!!

Rock that ‘kini, girl!

[Image via Twitter.]