has called for 'X Factor' bosses to increase the show's age limit to 18 after 16-year-old Luke Lucas broke down after messing up his audition at the Judges' Houses stage of the competition.
The Take That singer and his bandmate Robbie Williams
- who joined Gary in Los Angeles for the penultimate stage of the ITV1 show - don't think it's fair to put so much pressure on youngsters
Gary said: "Luke is too young. It was too much for him, no wonder he cracked. 16 is just too young to be in a competition with this kind of pressure."
Robbie - who was just 16 when he joined Take That - added: "If it was my son or daughter I don't think I'd be pushing them that early. 18 or 19 maybe. You've found yourself, you've left school, hung out with your mates, earned some money.
"You've been anonymous and done your fun things. At 16 it takes your b******s off. I do think 16 is a bit young. But when you get an opportunity you just grab it."
While Luke was devastated to not have made Gary's final four, Frankie Cocozza, Marcus Collins, Craig Colton and James Michael all sailed through to the Live Finals stage of the competition.
Meanwhile, the Over 25s - mentored by Louis Walsh
- consist of Sami Brookes, Kitty Brucknell, Jonjo Kerr and Johnny Robinson, while Misha Bryan, Janet Devlin, Sophie Habibis and Amelia Lily make up the Girls category under Kelly Rowland
Finally, after a whole host of shock format changes, Tulisa Contostavlos' groups are made up of Rhythmix, The Risk, 2 Shoes and Nu Vibe.