One lucky mama's gonna get a brand new bag! From Jennifer Garner to Katie Holmes to Madonna, celebs can't get enough of Mia Bossi diaper bags. And, now one lucky lil reader is going to get one too. All you have to do is leave a comment on this post for your chance to win.

Made of Italian leather with gold chrome hardware, the $400 sapphire-colored Caryn bag has a machine washable animal print changing pad, zip-in and zip-out lining, a cell phone holder, three bottle holders, two front pockets, a key chain holder, a diaper holder, a baby wipe holder, and a private zippered pocket. Also, stroller adjusting straps.

Click here for official rules. One entry per person — all repeat comments will be ignored. Also, you must be a TeamSugar member to comment, so if you're not, please register here for an account! Just leave a comment below explaining why you need the bag, and I'll do a random drawing on Wednesday, Dec. 19, at 5:00 p.m. PST to select the winner.