The singer, whose marriage to the funnyman collapsed in December after just 14 months, took to the stage at the glitzy prizegiving on Sunday to sing her new track Part of Me.
The song was written in 2010 and a version which recently leaked online included the line "You can keep the dog/I never liked him anyway," according to New York Post gossip column Page Six.
However, the singer reportedly changed the words for her Grammy performance in light of her divorce news, and instead sang: "You can keep the diamond ring/it don't mean nothing anyway."
The single was released on Monday and includes the reported lyric change.
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