The 'Stay with Me' hitmaker is due to take the stage at the MTV Video Music Awards this weekend and admits he is terrified about singing to a star-studded crowd including the 'Drunk in Love' hitmaker and Taylor Swift.
He told Capital FM: ''It's going to be so scary! Beyonce's going to be there, I might freak out. My main aim is to not sweat, because I'll be so nervous.
''I watch the VMAs every year, and have done from a very young age, so this is going to be a very surreal weekend. I get to run through it a few times, but I'm not going to kiss Madonna or stick my tongue out, so don't be expecting that!''
Sam added: ''The fact that I'm performing there feels like I've won already.''
It was recently confirmed that fellow Brit Jessie J will open the show with the first live performance of her new song 'Bang Bang' which features Nicki and Ariana.
David Bowie and Rag'n'Bone Man both won two awards at the 2017 BRIT Awards at the O2 Arena in London last night.
The grime superstar will top the bill on Saturday night at Finsbury Park's Wireless Festival in July, with The Weeknd and Chance The Rapper also...