Former Three Days Grace vocalist Adam Gontier is starting to re-enter the fray as a solo artist and one of his first shows back will be as part of the 2013 Rockapalooza Festival in Jackson, Mich. this June. Gontier and masked rockers Mushroomhead are the latest acts to join the lineup, which was revealed earlier this year.

The two bands will join Candlebox, Saliva, Taproot, 12 Stones, Hurt, Surrender the Fall, Smile Empty Soul and plenty more at the June 22 event, which takes place at the Jackson County Fairgrounds.

In addition, the festival has also added the Monster Energy Motocross Team to the day's activities. The team will be on hand to show off some of their riding and stunt skills for those in attendance.

The weekend will actually consist of three days of entertainment, with the Saturday Rockapalooza being the highlight. Friday (June 21) will feature a free Rockapalooza pre-party headlined by a still-to-be-announced national headliner, with support from Surrender the Fall and a number of up-and-coming acts.

The Saturday (June 22) Monster Energy Drink Rockapalooza Festival will feature a total of eight stages, with each of the aforementioned acts performing for fans. The fun concludes on Sunday (June 23) with Countrypalooza, a day filled with over 40 acts playing country and classic rock music on three stages.

For further festival and ticketing details, click here.