Jennifer Hudson performs onstage during a memoriam for Whitney Houston at the 54th Annual GRAMMY Awards held at Staples Center on Feb. 12, 2012 in Los Angeles

*Jennifer Hudson was reportedly “having a hard time” at rehearsal for her Grammy Award performance of Whitney Houston’s hit “I Will Always Love You.”

The number, which aired three-quarters of the way through the broadcast, took place at the end of the “In Memoriam” segment. [Scroll down to watch.]

During the Sunday afternoon rehearsal, a Grammy crew member told The Hollywood Reporter that Hudson was “crying and had to keep pausing” to collect herself. “She was having a hard time getting through the song, especially on the second run-through.”

While competing on season 3 of American Idol, Hudson sang Houston’s “I Have Nothing” one week before being eliminated.