"Julia always tips her delivery guy USD 100 but when he showed up at her house dripping with sweat, she asked if he was ill. The guy apologised and told Julia he'd been sweating because the air conditioning in his car had been broken for days," National Enquirer magazine quoted a source as saying.

"Julia nodded, took her produce and handed the guy his tip, a cheque for USD 500, telling him 'now get your air conditioning fixed, it's on me," the source added.