JLS are passing their musical skills to a team of rugby legends who will try to perform in front of 82,000 fans at Twickenham.
The boyband pin-ups have been coaching stars including Austin Healey, Bill Beaumont and Brian Moore as part of their Sport Relief efforts.
The sportsmen will be singing Proud, JLS's official single for the charity, prior to England's final 6 Nations game against Ireland.
Former Strictly Come Dancing contestant Austin said:
"There have been many times in my life when I've been filled with nerves and adrenaline before a big game, but nothing compares to the terror of singing live in front of a full house at Twickenham."
Another member of the chorus, Mike Catt, said: "We've all had some practice singing in public as we've all belted out the national anthem before kick-off, but I don't think that compares to having to sing in tune for three minutes."
Photo: © PA