Tonight will see viewers and listeners across Wales get the chance to singalong to Sir Tom Jones' Delilah; a video has been recorded of people across the length and breadth of the country delivering a line each. It will be broadcast simultaneously on BBC 1 Wales and BBC Radio Wales.
The special version, recorded as a gift on the occasion of the star's 70th birthday, features schoolchildren, butchers, firemen, lifeboat crew, mechanics and cheese factory workers among others.
You can join in at 6.55pm.
