BSPEARSDOG0110_03.jpgBSPEARSBOOTS011008_02.jpgBritney Spears BSPEARSDOG0110_11.jpg
We just got these shots of a very tired looking Brit out with Adnan last night at their first pit stop.

Going to Mexico and back in less than 24 hours probably wasn't the most restful vacation she could have chosen, and it clearly shows.

If Britney doesn't take a break, she's headed for another breakdown!