02/24/2014 at 02:45 PM EST
These Disney gals are sticking together!
Christina Aguilera – who is expecting a baby with fiancé Matt Rutler
later this year, PEOPLE confirmed – supported Miley Cyrus
at Saturday night's Los Angeles stop of her Bangerz Tour at the Staples Center.
Clad in a loose white T-shirt, skinny jeans and sky-high heels, the Voice
coach, 33, "looked radiant and glowing" as she walked around with girlfriends, a source tells PEOPLE.
After the concert, she Tweeted a photo of Cyrus
, 21, in one of her revealing costumes, reminiscent of Aguilera's former "Stripped" days.
"Cheers from one dirrty girl to the next @MileyCyrus…wear em' loud & proud, girl- yes!!" she captioned the photo.
– Melody Chiu