Matty from VANT is in to premiere the Hottest Record, plus Mystery Jets play live.
Day two of Radio 1's Gregathlon for Sport Relief and Greg hits Wales.
Alice Levine is back on the Gregathon finish line to play Real or No Real!
Lion Babe are in the Radio 1 Live Lounge for Clara, plus another motivational mix for Greg
Hi huuun... Grimmy catches up with Ryan Reynolds.
Dua Lipa drops in with the Hottest Record In The World.
It's day one of BBC Radio 1's Gregathlon for Sport Relief - find out if Greg survived!
Alice Levine plays Real or No Real from the finish line of the Gregathlon in Belfast!