Four girls. All can sing, play and write songs--sometimes all at once. And none are named Trisha. The four principal members of Austin’s The Trishas would have you believe that they’re not blood related, but to hear them sing together, you’d swear they were harmonizing from the womb. Then again, sometimes luck and fate sing in perfect harmony, too, and uncontested magic just happens — just as it did the very first time Jamie Wilson, Kelley Mickwee, Liz Foster and Savannah Welch ever shared a stage together. It was ostensibly supposed to be a one-off gig — two songs as part of a tribute to Savannah’s father, famed songwriter Kevin Welch, at the 2009 MusicFest in Steamboat Springs, Colo. But midway through their first practice, it became clear to all in the room that they were on to something good. Goosebumps don’t lie.