Bo Bice, who was to step in for an ailing Ashlee Simpson at Monday's Radio Music Awards in Las Vegas, fell ill himself on Sunday and was forced to pull out of performing on the show.

After complaining of stomach pains Sunday night, Bo was rushed to a Las Vegas hospital where doctors discovered complications from the intestinal surgery the "American Idol" runner-up had in August (see [article id="1508067"]"Bo Bice Has Emergency Surgery, Misses 'Idol' Tour Dates"[/article]).

Bo's spokesperson described the issue as minor and said the singer is fine and returning to his home in Nashville for treatment.

The singer was asked to perform at the RMAs at the Aladdin Resort & Casino when Simpson backed out of her slot Friday after collapsing in Japan (see [article id="1518506"]"Ashlee Simpson's Collapse Due To Exhaustion"[/article]).

According to his spokesperson, Bo was scheduled to take the holidays off regardless and should be healthy enough in early January to shoot his first video, for "The Real Thing" (see [article id="1517808"]"Intestines, 'Idol,' Baby And Bon Jovi Helped Inspire Bo Bice's Debut"[/article]).

The Goo Goo Dolls will replace Bo and perform "Better Days," according to a spokesperson for the Radio Music Awards, which will air live at 9 p.m. ET on NBC.