Christina Aguilera and Matthew Rutler stepped out for a rare appearance at the Breakthrough Prize Ceremony in Los Angeles ...

Christina Aguilera and her fiancé Matthew Rutler looked very much in love as they celebrated his 40th birthday in Los Angeles ...

Christina Aguilera and fiancé Matthew Rutler had a fun — and rare — date night this weekend. The duo attended the 11th annual Breakthrough Prize ceremony Saturday, April 5, in Los Angeles.

Nickelback's Mike Kroeger shares one particular pop star whose music Vinnie Paul used to crank en route to The Clubhouse ...

Only Christina Aguilera could belt her heart out and stop onlookers in their tracks all while crossing her arms and casually ...

Here are the latest celebrity sighting photos — from paparazzi shots of a celebrity shopping to a star walking on the red ...

Christina Aguilera and her fiancé Matthew Rutler looked ... The two were all smiles, as they shared a special night together. Christina later wore a chic black jacket, following rumors that ...

"I was proud to give it a second life on a night all about pushing boundaries and honoring brilliance," the philanthropist ...

The concert will start at 8 p.m. at the Hollywood Bowl featuring Christina Aguilera, Gustavo Dudamel and Gerald Clayton.