Heidi Klum's daughter Leni looks chic in a grey co-ord as she heads to a shoot on her 18th birthday

Heidi Klum says she is determined to gatecrash Simon Cowell's stag party disguised as a man

Heidi Klum, Sofia Vergara and Simon Cowell arrive on set of America's Got Talent in Pasadena

Heidi Klum doubles the leather as she arrives on the set of America's Got Talent in Pasadena