Grammy Lifetime Achievement award winner Glen Campbell certainly didn't show signs of his Alzheimer's disease on the Grammy stage Sunday night. The country legend, who's been using teleprompters on his current farewell tour, never glanced down once singing his iconic 'Rhinestone Cowboy,' and he had everyone from Paul McCartney to Lady Gaga singing and clapping along.

"I've got my own choir here," Glen laughed in the middle of the song.

The Band Perry began the medley of Glen Campbell hits with 'Gentle on My Mind,' backed by the 75-year-old singer's band, which includes his sons and daughter. Blake Shelton followed with 'Southern Nights' before the country legend himself took the stage sporting a white sequined jacket, black pants and a whole lot of energy.


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