We knew it would happen eventually. On April 15, Miranda Lambert had a public run-in with ex-husband Blake Shelton and his current girlfriend, Gwen Stefani, at the Academy of Country Music Awards in Las Vegas. When Miranda — who recently sparked plastic surgery rumors — took the stage to perform "Keeper of the Flame," Blake and Gwen were sitting "in her direct line of sight," according to a witness who spoke exclusively with In Touch. The couple — who started dating in November 2015 — apparently "sat still and did not exchange glances or words with one another the entire time." But don’t worry, the awkwardness doesn't stop there. When Miranda accepted her award for Song of the Year for "Tin Man," she explained to the crowd that her album, The Weight of These Wings, was recorded shortly after her and Blake’s 2015 split, but she refused to make eye contact with the 41-year-old singer.