2004 Lexus ES 330 Rattle or vibration

I am hearing a weird rattle or vibration of some sort coming from the passenger front tire. i only hear it when i drive over bumps or something like that. Speed and turning have nothing to do with it. it is very annoying and can hear it when the music is down. kinda embarassing because of the known smooth quiet ride of lexus it is noticeable. i went to Harris Tire they said it was the A arm bearings, Carmax said it was the sway bar. Another mechanic said it was the shocks, (without lookin at it) i am asking if anybody else had a similar experience or know what it could be.