Ian Somerhalder, Katy Perry, Gwen Stefani and More in This Week's Fun and Funny Celebrity Twitter Pictures!
It was a busy week for celebrities on Twitter as the stars shared exciting holiday photos from work and play. Ian Somerhalder visited The Tonight Show while No Doubt saluted Paul McCartney at the Kennedy Center Honours. Kathy Griffin and Katy Perry teamed up to perform for the troops and Jenna Dewan got a special surprise on her 30th birthday. Don't forget to follow PopSugar UK on Twitter for all the latest celeb news and photos!