Nine Inch Nails and Soundgarden will be touring together this summer, and they'll have experimental rap group Death Grips on every show as support.

Both headlining bands recently reached an important anniversary. Both of the '90s superstar outfits released their classic albums -- Nine Inch Nails' 'The Downward Spiral' and Soundgarden's 'Superunknown' -- on March 8, 1994. So both of those albums are now 20 years old. Feel old yet?

Soundgarden recently reunited after being estranged since 1997. In June, they will release the 20th-anniversary edition of 'Supernknown.'

No word yet on what crazy antics Death Grips will be pulling, or if they plan on doing something to get kicked off the tour early. Whatever it is, it'll probably be an amazing show.