UPDATE: Beyonce Knowles brought some female spirit to the football stage in a dance-heavy, 13-minute performance at the Super Bowl on Sunday night (Monday morning Perth time).
She sang live, too, with her background singers helping as the pop star danced around the stage.
She emerged onstage singing some of Love on Top, transitioning to her hit Crazy In Love in an all-black ensemble.
She ripped off part of her shirt and skirt as she danced hard with background dancers doing the same.
Her Destiny's Child bandmates joined her for their hits Bootylicious and Independent Woman, but Kelly Rowland and Michelle Williams were barely heard.
They also jumped in for some of Single Ladies (Put a Ring On It), where Beyonce's voice got better.
She sounded best on Halo, which she belted out on a bended knee.
Alicia Keys performed a lounge-y, piano-tinged - and live - version of the US national anthem ahead of the Super Bowl.
The Grammy-winning singer played the piano as she sang The Star Spangled Banner with her eyes shut.
Her publicist said the performance was live, days after half-time performer Beyonce admitted singing along to a prerecorded track at US President Barack Obama's Inauguration.
Keys' version was soft and featured additional lyrics: She added "living in the home" before belting "home of the brave" as she finished the song.
Before Keys hit the field, Jennifer Hudson performed America the Beautiful with the 26-member Sandy Hook Elementary School chorus.
The students and Hudson wore green ribbons on their shirts in honour of the 20 first-graders and six adults who were killed in a December 14 shooting rampage.