Wrigley's announced Monday it would suspend its ad campaign featuring Brown as the spokesman for Doublemint gum.
"Wrigley is concerned by the serious allegations made against Chris Brown," the company said in a statement. "We believe Mr. Brown should be afforded the same due process as any citizen. However, we have made the decision to suspend the current advertising featuring Brown and any related marketing communications until the matter is resolved."
Radio stations in Cleveland, Pittsburgh and Indianapolis have pulled Brown's music in light of the abuse allegations. Radio host Java Joel of Cleveland's 96.5 WAKS-FM said he stopped airing the songs Monday when outraged listeners called to criticize Brown, according to the station's Web site.
Though officials refuse to confirm whether Rihanna is the accuser in the domestic abuse case, members of the hip-hop world and Hollywood are rallying around her and Brown.
"I was completely devastated by the concept of what I heard," Kanye West said Tuesday on Ryan Seacrest's KIIS-FM radio show. "Rihanna is so important to our culture ... to pop music. ... Her taste level and her age. ... She has the potential to be the greatest artist of all time."
"In that sense, I feel like that's my baby sis," West said. "I would do any and everything to help her in any situation."
According to Us Weekly magazine, rap mogul Jay-Z, who discovered and mentored Rihanna, "hit the roof" when he found out about the alleged fight.
Actor Terrence Howard came to Brown's defense Tuesday, telling Hollywood.tv, "Chris is a great guy. He'll be all right. And Rihanna knows he loves her."
But Wednesday, he released a statement saying, "When they asked me about Chris Brown the other day, I was in no way aware of what he had been accused of. Had I known, I would have never had said something so insensitive."
Rapper T.I., who is set to begin a yearlong jail sentence for federal weapons charges next month, told "Last Call's" Carson Daly that he spoke with Brown Monday and that the singer's "cool."
"He cool, you know. I guess he a little concerned about the situation, but he's still the same Chris," T.I. said. "I told him this too shall pass."
Sunday was a dark day for one of America's most promising stars. Chris Brown was a triple threat. He sang hit songs ("Kiss Kiss," "Forever"), danced circles around the competition (with moves comparable to those of Usher and Michael Jackson) and made inroads into the acting world ("The O.C." and "Stomp the Yard.")
He's more of a Jonas Brother than a Lil Wayne or a young Jay-Z. He doesn't sing about a gangster past; he doesn't rock blinding quantities of bling. He shot to fame in 2005, at age 16, with "Run It!" -- the hit topped the Billboard Hot 100 and made Brown the first male artist to have his debut reach No. 1.
Now, Brown's clean-cut image may be shot. He turned himself in to Los Angeles authorities Sunday night for allegedly assaulting a woman. He was booked and released on $50,000 bail; he's scheduled to go to court next month.
"I can confirm that the LAPD was at the DA's office and presented the case," a representative from the L.A. District Attorney's office told ABCNews.com Tuesday. "[The case is] regarding Chris Brown and that's all we're saying."