On a gorgeous Sunday night, Alison Krauss and Union Station played their lilting blend of acoustic pop and old-school bluegrass for a sold-out crowd during the summer concert series finale, which was also one of the finest Red Butte Garden shows of the summer.

It was a fitting end for the 2011 series which ended its 25-show run with Krauss, a show that sold out in April in a matter of hours, said series programmer Chris Mautz, during a pre-show introduction.

Krauss's set is a balancing act between the group's mellow, pop-flavored love songs and its scorching traditional bluegrass numbers which spotlight the searing talents of Krauss, a classically trained violinist, dobro player Jerry Douglas and guitarist Dan Tyminski.

Although most of the audience seemed to love whatever the band played, loud cheers could be heard for bluegrass stomps such as Tyminski's "Rain Please Go Away," and "Wild Bill Jones." An early highlight was Krauss's take on "Fiddlin' Bill." A show-stopper was Douglas's blazing five-minute solo section which eventually wound into Tyminski's "The Boy Who Wouldn't Hoe Corn."

Radio-friendly pop numbers featuring Krauss's angelic voice such as "Ghost In The House," and "Dimming of the Day," were also well-received, but owed much of their spark to Douglas' always-entertaining fills, and energetic short breaks.

Not surprisingly, the biggest applause of the night was reserved for Tyminski's version of the ancient bluegrass standard "Man of Constant Sorrow," made popular during the 2000 movie, "O Brother, Where Art Thou,"

By the time, the group had reassembled around one microphone for a medley of songs that included "Down To The River To Pray," and "When You Say Nothing At All," and "There Is A Reason," much of the crowd was on its feet and applauding, below stars and a half-moon. Some way to end a summer.