Celeb Tracker: The 5 Best Photos of the Week

From Amy Schumer's GQ threesome, to the First Lady's sit-down with Miss Piggy, here's what some of your favorite stars were up to this week.

Kevin Mazur/Getty
Kevin Mazur/Getty
1
Seth McFarlane & Christina Aguilera
The actor and the singer cozy up for a duet during a tribute to Frank Sinatra's 100th birthday at Lincoln Center in New York.
Paul Morigi/Getty
Paul Morigi/Getty
2
Miss Piggy & Michelle Obama
The First Lady and the First Lady of The Muppets join up for a reading of 'Twas the Night Before Christmas during the 93rd Annual Christmas Tree Lighting in Washington, D.C.
Paul Morigi/Getty
Paul Morigi/Getty
3
Reese Witherspoon
Meanwhile the Academy Award winning actress mans the microphone with the help of the big man in red.
Stefanie Keenan/Getty
Stefanie Keenan/Getty
4
Bradley Cooper & Amy Schumer
The actors catch up with director Judd Apatow at the GQ Men of the Year Awards, even though Schumer looks like she can't be bothered, lol.
Cameron Spencer/Getty
Cameron Spencer/Getty
5
Sam Smith
The singer looks ethereal against the lights on stage at a recent concert in Sydney, Australia.