Guess who was spotted backstage at Mariah Carey’s concert at the Beacon Theater in NYC over the weekend? Lady Gaga!

It was definitely a divalicious meeting between the two top singers Sunday Night — and the pair even took a couple of seriously awesome selfies.

Mariah, who’s notorious for not wanting anyone else to share the limelight with her on-or-off-stage, welcomed Gaga with open arms. Good thing Gaga’s scarlet dress was the perfect complement to Mariah’s silvery one.

On the 44-year-old legendary singer’s Instagram account, the two posed demurely — possibly channeling a 60s girl group. “Taking a selfie with the beautiful @ladygaga! Merry Christmas,” Mariah wrote to all her fans.

Gaga, of course, got a little — shall we say — earthier?

The 28-year-old pulled a sexy pose while Mariah looked somewhat bashful [see lead image]. The message Gaga sent to her Little Monsters on Instagram said, "Merry F…Christmas. Love Mariah and Gaga. This lady is so kind, such a star and sounding legendary tonight at Beacon Theatre.”

Flattery will get you anywhere and for Gaga, it got her not one, but two uber glam selfies!

Who knows, if Lady Gaga keeps it up, she might just nab a duet with the multi-octave singer.