Ewwwww!!!  According to The National Ledger, Lindsay Lohan might not be the only reason why Calum Best came back to the US last week… He and Lindsay are officially “together” but right after spending the night with Lindsay at her 21st birthday party, Calum was out with icky Kimberly Stewart!! 

Either way, Calum is bad news and Kimberly is a skank.  She’s been hooking up with Tommy Lee!!!  Calum said months ago he was going to go to rehab, but he has yet to go… This is just bad for poor Lindsay’s recovery.