Kelly Osbourne and mom Sharon landed at Los Angeles International Airport on Monday after celebrating the starlet's 32nd birthday in London, and not only did they look fab after the long flight, but they had a good laugh when their driver whipped out a crying baby sign and put it over Sharon's face!

Earlier in the week the ladies were snapped arriving at Fountain Studios in London, and it seems like they were having a bit of a squabble prior to the X Factor event. Sharon appeared to be in a hurry when she got out of the car, and though Kelly kinda chased after her, Sharon gave her daughter the hand! We're not sure what the fight was about, but the two haven't always had the best relationship.

Still, it couldn't have been that bad, because they were able to forget about it when they partied it up on Saturday, with famous faces like Nicole Scherzinger and Simon Cowell!