Funny, I’ve seen probably every episode of that series, and I don’t recall Denver donning drag… 
I’m one of the many who always confused Michelle Branch and Vanessa Carlton for each other.
Helen Hunt and Jodie Foster.
“EI” vs. “IE”
I cannot get it straight.
Supreme irony: I’m a freakin editor! But I have to say the little mnemonic thingy every. single. time. I blame it on my mother. She misspelled my middle name.
Oh.
AND… Ben Stiller and Ben Affleck. Same guy, right?
In my house, we always say “get the butter”, when actually we meant, “get the margarine”.
Glenn Close and Meryl Streep.
Kid Rock is the skeevy one with the hat, and Chris Rock is the comedian.
Me too. I went the longest time thinking Julia Stiles was in Traffic.
I always mentally blur Tony Shalhoub with Robert Picardo. I mean, I have it straight now, or so I think, until I confuse them again next time.
Dustin Hoffman/Al Pacino
Richard Gere/Richard Dreyfuss. (Plus I always forget Dreyfuss’s name)
Sarah Jessica Parker/Jennifer Aniston
Minnie Driver/Andie McDowell (Plus I always forget BOTH their names)
Capitol/capital
Principal/principle
geodes/diodes
…I think I’ll stop; this is depressing.
It took me a long time to break the mental block I had over the names of Billy Idol and David Bowie.
Admiral Byrd and Admiral Peary. Well, they were both cold.
Patricia Clarkson and Hope Davis. I can tell them apart when I see them, but I can’t remember which has been in which movie.
I’d pay cash money to see what they’d come up with if they switched for an episode/issue.
I can’t keep Leo DiCaprio and Matt Damon straight. To me, they both look like teenagers who’re pissed because they got shorted on their allowance.
Also the words effect and affect give me fits. At one point I made myself write the words and their definition 5 times each, but it didn’t stick.
I often confuse the Allman Brothers with Lynyrd Skynyrd. That’s probably a pretty common thing to do.
Billy Joel and Billy Idol, too.
That one can be VERY embarrassing. :o
Francis Drake: Sailed for Queen Elizabeth.
Francis Bacon: Member of Parliament for Queen Elizabeth, violently against alchemy.
Roger Bacon: Alchemist.
I always confuse Charles Durning and Kenneth McMillan