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Looks like someone needs a nap, and it's not little 3-year-old Bronx!

Proud papa Pete Wentz was out and about in Ventura with his son and a friend, but the singer looked absolutely exhausted as he carried the toddler to the car.

But apparently it's not lack of sleep that's got the Fall Out Boy down. Ashlee Simpson's ex Tweeted after being caught on camera looking forlorn: "nah not depressed, content. for some reason i come off sad when I'm happy and the reverse..."

Could've fooled us, Pete!