Seven Nation Army's Going On, Call Me Uprising, All The Single Ladies (In Mayberry), and Suit and Commercial
In 2008, DJ Fac did something either amazing or blasphemous by combining The White Stripes and The Backstreet Boys with "Seven Nation Army's Going On":
In 2009, we have CJR putting Muse and Blondie together like they're matching puzzle pieces:
Also in 2009, Party Ben created "All The Single Ladies (In Mayberry)", which is exactly what it sounds like. And while this is easily the "jokiest" entry in my list, it still works nicely.
And to finish out your Timberlake fix, The Hood Internet mashed him up with Daft Punk: