Fergie may always be a bombshell when she performs on stage, but during the "A Night of First bash in LA, she totally bombed.

"The Black Eyed Peas singer couldn't close up her dress properly, so instead she left it half unzipped, added a black panel and voilà-perfectly fitting from the front! But she left it totally visible for all to see at the A Night of Firsts bash in Los Angeles," reported E! Online about Fergie's unfortunate wardrobe malfunction.

Wardrobe adjustments are quite common in the glamorous world of celebrities and fashion, where size 2 dresses are sometimes a tad bit too tiny to fit a healthy but quite busty star like Fergie.

Reports say that she could have done everything in her power to hide the open flap like flip the ribbon from her lovely lady lumps to shield the black panel from unforgiving eyes, or maybe even wear a jacket to completely cover the unfinished back.

"Fergie has had her share of fashion disasters, but this mistake was big. Huge. What was she thinking?" continued E! Online about the dress.

Fergie is the lady vocals for the American pop group phenomenon The Black Eyed Peas along with will.i.am, apl.de.ap and Taboo. They gained worldwide notoriety after their worldwide song "Where Is the Love?" back in 2003. Since then, they have released numerous number one hits and RIAA-certified platinum albums.

The fitting of the Jean-Charles de Castelbajac dress may be causing alarm, but the kooky dress, paired with matching black stiletto heels and clutch, had Felix the Cat plastered all over the dress, with two "Felixes" consequentially located in front of her lady parts and one just below her humps that got you spending (cue music).

Although Fergie, also known as Stacy Ann Ferguson, gained worldwide success with The Black Eyed Peas, her band members supported her all the way when she released her own album, "The Dutchess," which enjoyed six hits, including "Big Girls Don't Cry. She is happily married to Josh Duhamel after meeting in 2004 where the band appeared in Duhamel's critically acclaimed show, "Las Vegas."