The new talent show started last weekend and is back this weekend for the second round of auditions.
Let It Shine is on the hunt for singers to perform in a new stage musical based on the songs of Gary's band Take That.
Alongside Gary, Spandau Ballet singer Martin Kemp and former X Factor judge Dannii Minogue will take up a role on the judging panel. And for the first round of auditions, they're joined by guest judge, West End singer and star of Glee Amber Riley.
In this weekend's auditions one of the acts who sings is 35-year-old Lee Stinchcombe from Bristol.
Worried he's 'too old' for the show, Gary encourages: "You're never too old."
Lee reveals he's a charity worker by day and a Take That tribute act by night and does an impression of Gary.
"Be careful, this is my area," warns Gary.
And while Lee's impression leaves Martin in stitches, Gary jokes: I'm just looking for the zero button, the one that opens the trap door..."
Once the fun and games are out of the way, Lee gets on his audition as he sings The Power Of Love.
Lee and the other hopefuls singing this weekend have just one performance to impress the judges to make it through to the next stage.
Each judge will mark the performances out of 5 and hopefuls need 15 or more points out of 20 to progress.
Meanwhile, as well as those who have applied to be on the show, Gary has gone out across the UK to find talented contestants who have been secretly nominated by their friends and families.
The show sees Gary surprise them and personally invites them to audition in front of the Let It Shine judges
Let It Shine will start on TV on BBC One on Saturday, January 14 at 7PM with the second round of auditions.