Oscars 2015: Watch Jennifer Hudson Sing 'In Memoriam' Song on 'Smash'

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Jennifer Hudson as Veronica Moore on NBC's Smash

Recognize the song that Jennifer Hudson performed after the "In Memoriam" tribute at Sunday's Oscars? Then you must be a Smash fan.

2015 Oscars

"I Can't Let Go" is an original song written for season 2 of the NBC musical TV series. In the show, the song was written for the musical Hit List by characters Jimmy Collins (Jeremy Jordan) and Kyle Bishop (Andy Mientus) for Broadway superstar Veronica Moore -- played by none other than Jennifer Hudson.

The lyrics are fitting for a "gone too soon" tribute: "If I hang on to this heartache/ Then my soul will not be free/ So I keep trying, but I just cannot let go."

Oscars 2015: Jennifer Hudson Performs 'I Can't Let Go' for 'In Memoriam'

Watch the original version and the Oscar rendition below: