The 53-year-old 'X Factor' boss, who is blissfully happy to be expecting his first child with his girlfriend, Lauren Silverman, was photographed making the generous donation as he stopped at a set of traffic lights in his convertible black Bentley in Los Angeles, reported Contactmusic.
Cowell was awarded by Lauren, 36, for his kind gesture as she instantly leaned over to give him a passionate kiss before the lights turned green.
The couple were reportedly making their way to Santa Monica for the day.