Thats right, folks - another show has been added to the growing 2011 weezer concert line-up. Weezer will be playing at Houston's Free Press Summer Fest 2011, which takes place the weekend of June 4-5. (They will be releasing the schedule in April). Tickets will be available at www.pegstar.net. Its been a good while since weezer was down in Texas, and we're excited to get back there! As Rivers onc…