Jimmy Fallon has had celebrities do some great things on his show, but a British talk show had Sandra Bullock rapping and Tom Hanks doing the "Chopsticks" piano-dance from "Big"...on the SAME episode!

On "The Jonathan Ross Show" this weekend, Sandra demonstrated how well she knew "Rapper's Delight" by The Sugarhill Gang.

Here's that:

Then, Tom and the host had some fun with an operational piano mat...before Sandra joined in to do "Chopsticks" with Tom.  She even did it in HEELS.

Here's video of that: