Scott sang a number "All that jazz" and while singing, she came down to the audience and asked Jackman, Aishwarya, superstar Shah Rukh Khan and filmmaker Karan Johar to sing a line along with her.
Aishwarya and Jackman were sporty enough to join in the song and sang one line each, a source says.
The two actors bagged the top honours at the FICCI Frames awards Friday night.
While Jackman, best known for his role as Wolverine in the "X-Men" series was presented the FICCI Frames Excellence International Honour, Aishwarya took home the Decade of Global Achievement award for her contribution to the Hindi cinema.