While most stars stress out about finding the perfect New Year’s Eve frock, Mariah Carey had to shop for multiple costume changes!  The dynamic diva performed at Madison Square Garden on the last night of 2009, changing into four amazing dresses.

PHOTOS: Mariah’s Four Fabulous New Year’s Eve Looks

Joined by hubby Nick Cannon, Mariah Carey sparkled on stage as the clock struck Midnight.

PHOTOS: Best And Worst Of New Year’s Eve

Which of Mariah’s four frocks rocked the hardest?  Check out the gallery in Style to find out!