Lohan Rides the Bull

5/15/2007 2:27 PM PDT BY TMZ STAFF
How does Lindsay Lohan keep up with her busy schedule of travel and partying? Must be the Red Bull!

LiLo was snapped stepping out of the Ritz-Carlton in Midtown Manhattan yesterday -- rockin' a can of the Bull -- but minus her most recent fashion accessory -- hunky boy toy Calum Best.

The serial dater and her man of the moment returned to the U.S. after a wet and wild Bahamas getaway -- where they were spotted swappin' spit in the waves.