Justin Bieber's on/off girlfriend Selena Gomez has caused a big stink in the fragrance world by allegedly refusing to promote a new scent.

Bosses at Adrenalina Inc. have filed suit against the singer/actress, claiming she has left them without a spokesmodel after they made a deal with her to create perfume products bearing her name.

The fragrance firm's lawyers claim their clients spent more than $2 million (£1.3 million) in marketing alone, and were stunned when Gomez allegedly refused to honour promotional plans.

Adrenalina officials are suing for damages and they have requested a court order preventing the star from pulling out of the deal, reports Tmz.com.