Free Concert series/Pittsbugh

Three Rivers Art Festival starts around June 6th
I'm really loving the line up this year!
Please feel free to let me know who you like, have seen etc. ,would love to see, would not miss em.
Opening night: JEFF(f-ing)Tweedy
Sam Bush
Trampled by Turtles. Only heard a few songs but really dig their sound!!
Kaiser Chiefs. ?
Amos Lee. (I'll b there)
The smithereens ?
Lucinda Williams (big fan , seen 3 times for free, can't make it )
Curtis Harding ?? Any info
Jake Bugg !!!! one of my favorite artists of the past two years.