Keys back on stage after illness

Alicia Keys has returned to the stage after cancelling a couple of shows with a throat infection.

The R&B star scrapped two shows last week but resumed her North American tour in Columbus, Ohio on Saturday night.

Keys is now scheduled to perform on Wednesday in Minnesota.

Meanwhile, Keys' support act, Jordin Sparks, is taking her vocal rest very seriously after being diagnosed with a career-threatening throat illness.

In a statement released on Monday, the former American Idol winner writes: "I'm supposed to be on full vocal rest, which means no talking, laughing, giggling, and singing. It's hard."

Sparks hopes to join Keys' tour by the end of the week.