Jessie J and Adele used to sing with each other at school.

The 'Sweet Talker' singer and the 'Skyfall' hitmaker were in the same year together at the BRIT School for performing arts in Croydon, South London, and Jessie has revealed the teenage pals would spend their lunch breaks making music.

Talking to PEOPLE, Jessie said: ''We were in the same year! We used to sing at lunchtime together. Obviously at that time we didn't realise that we'd both ''eventually'' have music out. But she's amazing. She was always that really bright energy at school.''

The 26-year-old pop star is still friends with Adele - who has a two-year-old son, Angelo, with her partner Simon Konecki - and they talk to each other when they get the chance.

She added: ''She's wicked, and every time I get a chance, I try and text her. But she's super busy ... Global superstar, mum - standard.''

Jessie hopes she and Adele, 26, will recreate their school days singing sessions and record a duet together in the future.

The singer - who has been nominated for her first Grammy Award for Best Pop Duo/Group performance for 'Bang Bang', her collaboration with Ariana Grande and Nicki Minaj - said: ''She's on my wish list. I would love to hear our voices together because we're so different vocally. We wouldn't do a classic pop song, though, but something deeper.''