[artist id="2476941"]Adele[/artist] has canceled the remainder of her sold-out North American tour due to "ongoing illness," a spokesperson for her label, Columbia Records, announced Friday.

Last week, the British belter was forced to cancel a show in Minneapolis due to a case of laryngitis, but came back to perform a concert in Denver. Then, earlier this week, under doctor's orders, she canceled five West Coast gigs and hoped that her voice would improve with rest. Adele had originally planned to return to the stage on Saturday at San Francisco's Warfield Theatre, but those plans went awry when her vocal condition didn't improve.

"Adele recently postponed five shows under doctor's orders when she was diagnosed with laryngitis," a statement from Columbia read. "While resting in Los Angeles, Adele met with an otolaryngology specialist who determined it was imperative that she take the next few weeks to recover with absolute voice rest."

All told, the final nine dates of her tour will be scrapped.

"I'm really frustrated," Adele said in a statement. "I was hoping with a week's rest, I'd be better to sing again straight away. However, there is absolutely nothing I can do but take the doctor's advice and rest some more. I'm so sorry."

Columbia said that plans to reschedule the cancelled tour dates "are being investigated," and that more information would be provided.

Since launching in North America in early May, Adele's tour has been a sold-out smash, thanks in no small part to the continued success of her [article id="1664536"]21 album[/article], which has sold nearly 2 million copies since being released in February and has topped the Billboard albums chart on nine different occasions.