Geri Horner teeters on HUGE platform boots as she returns to London after a whirlwind weekend at the Las Vegas Grand Prix

Rihanna wore $400k ANKLE watch to Las Vegas Grand Prix - embellished with over 70 carats of diamonds - but she might struggle to tell the time

Leonardo DiCaprio keeps it casual in shorts and signature hat as he awaits start of Las Vegas Grand Prix with cup of coffee

Heidi Klum goes topless under a black leather jacket as she makes a very racy appearance at the Las Vegas Grand Prix with husband Tom Kaulitz