Don't forget make sure you have the perfect props & facial expressions in order to maintain the illusion.
Example 1.
The Ronnie Corbett.
Oh sorry I didn't see the Oversized Bow Tie
Example 1.
The Robin Day
Whose voice can you mimic? Page 5
"And who's this Robin Day's with...?" *puts on beret, takes off glasses* "Why it's Frank Spencer!... Ooh, Betty!" *takes off beret, puts glasses back on again* "Who's that with you, Frank? It's only Michael Caine!"... (continues until everyone makes excuses to leave for the bar/toilet.)
I can actually do Janis Joplin. And Marge Simpson. 
Quote: Tim Walker @ July 29 2009, 11:14 PM BST
"And who's this Robin Day's with...?" *puts on beret, takes off glasses* "Why it's Frank Spencer!... Ooh, Betty!" *takes off beret, puts glasses back on again* "Who's that with you, Frank? It's only Michael Caine!"... (continues until everyone makes excuses to leave for the bar/toilet.)
Yeah
What a Tough crowd that was.
Talking of crowds, here's someone who always stands out in a crowd.. *Pulls out Fez, sees that everyones gone & bursts into tears.
It really was - just like that.
I haven't been back to Pontins since.
(This is the melancholy bit of Cannon & Ball's act in emoticon form.)
I can do the voice of "Badge". It's quite uncanny at times, but I'm a bit out of practice.
Quote: Badge @ July 30 2009, 1:16 AM BSTI can do the voice of "Badge". It's quite uncanny at times, but I'm a bit out of practice.
You sound nothing like him. 
Oh, lol. That's very good actually. 
Quote: Leevil @ July 30 2009, 1:17 AM BSTYou sound nothing like him.
Disagree. Had me fooled until he got to 'hyperventilate'. Then I realised it wasn't him.
I can do a Don Rushmore impression -
You're shit
I'm leaving
No I'm not
Yes I am
When's sexy girl coming back, more importantly? I like her style.
Quote: Renegade Carpark @ July 30 2009, 1:32 AM BSTI can do a Don Rushmore impression -
You're shit
I'm leaving
No I'm not
Yes I am
That's uncanny.
If I close my eyes, then I can't see what's going on.