Southern Cali rap-rock hybrids, the Kottonmouth Kings, are gearing up for their yearly stoner holiday celebration. For those who are clueless, it's April 20th.

The group have announced their annual 4/20 Freedom Fest tour dates, icking off in Tempe, Az on April 17th, and will cap things off with a smoke out on April 20th at The Grove in Anaheim CA. Joining the Kings will be Cypress Hill's Sen Dog and rock-reggae act OPM.

Kottonmouth Kings are touring in support of their tenth studio album, The Green Album, which debuted at no. 1 on Billboard's Independent Charts. Blending genres from hip-hop, punk-rock to stoney acoustic melodies, the album can only be described as "rip-hop." The group also recently released a video for the song, "Where I'm Going," currently available for viewing on YouTube.

The Kings are currently offering 4/20 Freedom Fest pre-sale ticket packages that include a collector's edition 4/20 CD/DVD, limited edition poster and VIP Laminate, and a meet and greet with the band at the venue. For pre-sale, visit their official website at SubNoizeStore.com.

4/20 Freedom Fest dates are as follows:

04/17 - Tempe AZ @ Marquee Theatre
04/18 - Las Vegas NV @ House of Blues
04/19 - San Diego CA @ House of Blues
04/20 - Anaheim CA @ The Grove of Anaheim