the pop star sang her single “Abracadabra” in a light-up mirrored box, and performed the first half of new track “Killah” in the back hallways of studio 8H before joining her neon-clad ...

In a BBC Radio 1’s Live Lounge session, the boygenuis bandmember recorded a haunting cover of Gaga's "Abracadabra ... Never miss a story — sign up for PEOPLE's free daily newsletter to ...