JOHN MAYER HOME BURGLARIZED AND 'RANSACKED'. John Mayer is the latest celeb to be hit by burglars ... TMZ has learned. Law enforcement sources tell us, someone broke into the singer's Beverly Hills-area home mid-morning Friday.\u00a0 The intruder got in by smashing a bedroom window. We're told the house was "ransacked."\u00a0 The burglar\/burglars made off with music equipment and personal property.\u00a0 Our sources say among the items taken ... some of John's watches.\u00a0 He has an enormous and enormously valuable timepiece collection. Our sources say the value of the property taken is between $100,000 and $200,000. No one was home at the time of the break-in.\u00a0 We don't know if John's burglar alarm was on. Somewhere around noon, a security guard noticed the broken window and called police. So far, no suspects.