AKM-GSIChristina Aguilera was all about taking time to celebrate with boyfriend Matthew Rutler on Tuesday, Dec. 17.
Fresh off the season finale of The Voice, and her 33rd birthday the next day, the pop superstar locked arms with her beau as they exited the Hollywood eatery Off Vine after a romantic dinner date.
The Grammy winner flashed a huge grin and looked glamarous in a plunging slinky silver top with matching heels and a long black skirt. She finished her look with black eyeliner, long eyelashes and pale pink gloss.
Rutler, who was perhaps holding a gift for his girlfriend in the form of a purple gift bag, sported a blue sweater, a leather jacket, jeans and sneakers.
Earlier in the evening, Aguilera joined Lady Gaga for a powerful duet of the latter's hit "Do What U Want" to commemorate the end of this season's singing competition series.
The platinum blond duo, clad in matching champagne lamé ensembles, put to rest any rumors of a long-rumored rivalry.
After the show aired, Aguilera tweeted about the 27-year-old singer, "She is such a powerhouse vocalist and I was honored to join the stage with @ladygaga tonight on #TheVoice!"
The day prior, Gaga spent some time "catching up" on the talent competition and gave her support for Aguilera's finalist Jacquie Lee. "Beautiful girl with a beautiful voice!" she tweeted.
Aguilera in turn replied, "Wow!! Thank you for the incredible support for @jacquieleemusic." (Lee, of course, lost to Adam Levine's mentee, reggae-soul artist Tessanne Chin.)