Fox News looks at remarkable career of Glen Campbell and his battle with …

Glen Campbell gave a farewell performance at the Grammy Awards Sunday night, supported by the Band Perry and Blake Shelton. The country and pop sing.

They may have not even been alive when Glen Campbell's "Rhinestone Cowboy" was a huge hit in 1975, but the two women seen sitting down and texting while most of the Grammy audience gave the singer a standing

Exhibit A: The lack of backlash against Glen Campbell, who allegedly knocked out Tanya Tucker's two front teeth in an altercation in the early '80s, and his "Rhinestone Cowboy" tribute, which got the crowd on its feet and even had Paul McCartney

Although Glen Campbell was recently diagnosed with Alzheimer's Disease, he showed no signs of it as he performed during his tribute alongside The Band Perry and Blake Shelton at the 54th Grammy Awards tonight! Ch-ch-check it out (above)!

Glen Campbell's step-out on the Grammys last weekend was deemed one of the Least Boring Moments of the show, where the retiring singer took the stage with.