leann230.jpg LeAnn Rimes has proved, once again, why she's a superstar.

Eddie Cibrian's wife, wearing a gorgeous form-fitting black sparkly dress, appeared on the America's Got Talent finale Wednesday night. The country singer performed her latest song "Give" ... with the dance team Silhouettes on stage behind her.

During the performance, the dance team used their bodies to spell out the words "Create," "Believe" and "Love."

After the song finished, a tearful LeAnn told host Nick Cannon, "I could barely sing the whole time, just the reaction and they’re so incredible."

We think she sounded fab! LeAnn Rimes' new album Ladies and Gentleman hits stores on September 27. Watch her incredible AGT performance below.