The grand opening of Britney Spears 's show Britney: Piece of Me happened last night in Las Vegas, and two of this year's biggest pop stars, Katy Perry  and Miley Cyrus , were on the red carpet to celebrate. While both singers have different styles, they both tried out a similar beauty look: fluttery lashes and a swipe of bright lipstick. Katy wore her hair pulled back in a polished braid with shimmering gold eye shadow and bubblegum pink lipstick. Miley traded in her signature red lips for a more coral hue. We'll be keeping track of this easy yet festive makeup look for New Year's Eve. But whose look did you like best?