Susan will be best remembered for her performance in the much-loved movie musical.
The Grease star became choked up as he paid tribute to his late friend and co-star.
The pair played Danny and Sandy in the much-loved musical, and remained friends in the decades that followed.
The American actor played Vince Fontaine in the hit musical.
Apparently, there really aren't worse things film bosses can do.
The revelation has given us chills, and it’s safe to say they’re multiplying.
'We always felt that she wasn’t just doing it to please Danny.'
It's been nearly 40 years since we first heard 'Summer Nights'.