The Chipettes decide to help out Miss Miller's losing streak of poker with her girlfriends by cheating. At the next poker game, Miss Miller's not aware that the girls are helping her secretly. She starts winning buttons from the other players & they leave upset.Miss Miller heads to her mattress to get her mad money out, head over to Las Vegas with the Chipettes in tow! Luckily, the Chipmunks are performing at that same hotel & the girls try to get the boys help of stopping Miss Miller.Meanwhile, she's on a winning streak hitting jackpots at slots, roulette. She promises the girls a super vacation. But then, she starts losing at blackjack. A hotel staff invites her to play baccarat with a mysterious player. She bets the house & loses.