Glen Campbell Earns Lifetime Achievement Award, Standing Ovation

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The Grammy Awards really tested the tear ducts of its viewers last night.

We had Adele return from throat surgery to belt out a version of "Rolling in the Deep;" Jennifer Hudson honor Whitney Houston with a pitch perfect rendition of "I Will Always Love You;" and Blake Shelton team with The Band Perry to pay tribute to Glen Campbell.

The country music legend was diagnosed with Alzheimer's last summer, but that didn't prevent him from taking the stage and performing "Rhinestone Cowboy," a performance that brought all attendees to their feet, most notably Paul McCartney, who the camera caught numerous times singing and dancing to the artist.

Watch Campbell and company in action now: