Southern Cali rap/rock group, the Kottonmouth Kings, are gearing up for this year's annual stoner holiday with a special 420 Freedom Fest show in April.

The show goes down on April 24th in Las Vegas, and will include special guests Unwritten Law, (Hed)pe, and Big B.

From there, the Kings will embark on a string of tour dates throughout April and May before they head on a full scale US tour this summer.

Kottonmouth Kings are riding a creative high after announcing they have added Oregon-based rapper Dirtball to the group as a full-time member.

Their new studio album, Long Live The Kings, is set for release April 20th. It is currently available for pre-order with a bonus CD and exclusive DVD at SubNoizeStore.com.

Below are the group's upcoming tour dates:

4/23 - Tempe, AZ @ Marquee
4/24 - Las Vegas, NV @ Freemont East Entertainment District(420 Freedom Fest)
5/07 - San Diego, CA @ House of Blues