Boards
"X sounds like Y on Z"
where X and Y are musical acts (or comedians), and Z is a drug.
I know this is old, old ground. But really, that Daily Telegraph quote on the Scarlett Johansson ad has been making me giggle for a good few minutes.
"Imagine Nico backed by the Flaming Lips on acid..."
The FLAMING LIPS you say? On ACID!?! I can only IMAGINE what that would sound like.