Fergie goes to great lengths to entertain her son, Axl!
The 43-year-old singer got all dressed up for her promo shoot for The Four -- but as it turns out, she goes through a whole other round of dress up every morning. Fergie has an entire costume closet full of superhero ensembles for both herself and her 4-year-old son.
"[Axl] is amazing," the GRAMMY winner, who returns to the host Fox's reality singing competition series for season two, told ET's Sophie Schillaci. "Daddy [Josh Duhamel] did a camping duty, but I had to work, but it's OK. I'm on Lego duty. And superhero costume duty."
"We have a costume room and we run around the house at 8 a.m.," she explained. "I'm a pink Power Ranger. I got the full catsuit on, I'm Catwoman, I'm all the different ones."
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Fergie Jokes That Son Axl Jack Is 'A Ham,' 'Just Like His Dad' (Exclusive)
Right now, Fergie says her son is into the Avengers -- all of them. "He runs around as Black Panther. He's got the blue, he's got the silver... we watched parts of it and he loves Black Panther. He loves Spider-Man. He loves Ant-Man. He loves them all," she explained.
"He goes through phases," she added. "Right now, he's The Flash and Black Panther."
"I think we're just going to take it to the next level. I mean, it obviously connected with people," Fergie said of how they're switching the show up for season two. "It was really important to just keep it honest, keep it competitive, to keep it great."
"You just have to watch and see," Trainor revealed, as DJ Khaled said, "it's a big surprise, actually."
"We really wanna give people a chance and lift them and make their dreams come true. So we're not just doing it you know because Fox is paying us a lot of money," Diddy insisted.
"Everyone brings their own thing to the table," Fergie added.
The Four: Battle for Stardom returns Thursday, June 7 at 8 p.m. ET/PT on Fox.