¡ǝɯosǝʍɐ ǝɹɐ sdnɥsɐɯ

If you like mashups, here are some must-haves:

Hathbanger - Party and Bullshit vs. Party in the USA

The Hood Internet - Cult Logic Forever (Drake vs. Miike Snow)

Whole-Z - Fix Your Deez

Whole-Z - Dear Scartissue

Whole-Z - This Joint is Poppin' Bottles

DJDie - Wampomania

The Kids Don't Stand a Chance (Miike Snow Mashup)

The White Panda - Throw Some Tik on That Tok

Beastie Boys vs. Matt & Kim - Good Ol' Fashion Rump Shake

Also, check out Hathbanger
This kid throws out dope mashups pretty consistently.