PHOTO:Adele and Boyfriend Simon Konecki Cuddle Up at Private Lady Gaga Concert

Adele and her boyfriend Simon Konecki made a date night out of Lady Gaga's private gig.

The 25-year-old "Rolling in the Deep" singer and her beau left their 13-month-old son,Angelo, at home to take in the pop star's performance at Annabel's in London Friday night.

It was a rare public appearance for the British songbird, who has been laying low since giving birth to her son Oct. 19, 2012.

Mother Monster hit the stage at the event in a sparkly onesie covered in white fabric, performing a medley of hits from her album Artpop, including "ARTPOP," "Poker Face," "Dope" and "Do What U Want."

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