"Christina Aguilera Shines in Las Vegas Residency Debut with Star-Studded Attendance"
This week in celebrity sightings, Christina Aguilera heated up Las Vegas with her performance, while Adam Levine rocked out in the Bahamas. Rita Ora prepared for New Year's Eve in Times Square, and Saweetie posed at a gala in Saint Barthelemy. Other stars spotted include Kevin Costner in Aspen, Emma Stone in NYC, and 50 Cent at a bottle signing in Yonkers. The article provides a roundup of various celebrities attending events, performing, or simply out and about, showcasing their activities and appearances across different locations.