LOS ANGELES (CBSNEWS.COM/AP– An ad on Snapchat asking users if they’d rather “Slap Rihanna” or “Punch Chris Brown” has spawned widespread outrage online and brought profuse apologies from the company behind the visual-messaging app.

Rihanna performs during the 60th Annual Grammy Awards show on January 28, 2018, in New York. (credit: Timothy A. Clary/AFP/Getty Images)

Snapchat said it is investigating how the ad for a mobile video game called “Would You Rather” made it to the app.

READ MORE: Store Clerk Delon Johnson Arrested For Murder After Shooting Men Who Robbed Business, Police Say 

Rihanna, who Brown was convicted of assaulting when she was his girlfriend in 2009, posted a statement on her Snapchat and Instagram accounts.

“I’m just trying to figure out what the point was with this mess!” Rihanna, 30, wrote. “I’d love to call it ignorance but I know you ain’t that dumb! You spent money to animate something that would intentionally bring shame to DV victims and made a joke of it!!!”

“Shame on you” she goes on to say. “Throw the whole app-oligy away.”

“This advertisement is disgusting and never should have appeared on our service,” a Snap, Inc. spokesman said in a statement. “We are so sorry we made the terrible mistake of allowing it through our review process.”

READ MORE: Mexican Government Takes Aim At US Gun Manufacturers, Sues Over Toll Of Arms Trafficking

Snapchat said most of its advertising is bought through a self-service platform but is subject to review that should have stopped the ad. “Would You Rather” is now blocked from advertising there.

Brown pleaded guilty to felony assault for his attack on Rihanna in 2009 just hours before the Grammy Awards.

The ad and Rihanna’s response lit up Twitter, with many vowing to delete their Snapchat accounts.

Snapchat’s stocks were down 4 percent Thursday. The company’s stock is always volatile, and investors worry that the fickle teens and young millennials who are its primary users will drop it.

MORE NEWS: Dallas Police Trying To ID Lumber Thief Caught On Tape At Construction Site

(© 2018 CBS Interactive Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)