Mumford & Sons plus Little Mix have told music fans to "stand up" to rip-off ticket touts.
The rock and pop stars, using the hashtag "#ToutsOut," have called on music fans to sign a petition so that tougher penalties for touts can be debated in Parliament.
They are hoping that public support will give them 100,000 signatures for a debate to be held about tougher sanctions for resale websites and to force ticket resellers to reveal their identities.
There had been 12,618 signatures by Sunday at 8.30pm.
Mumford & Sons issued a passionate message on their website which directs to the petition.
They said: "If getting onstage is one of the best things about being a musician, seeing your audience get ripped off is undoubtedly the worst.
"At M&S HQ we try hard to ensure that true fans have the best opportunity of getting into shows, at the right price, but are often powerless when faced with organised industrial-scale ticket touting.
"At the moment, the law makes it easy for these shady operators to hoover up tickets and profit at your expense – so we are joining with others across the music and creative communities to a support petition that demands politicians tighten up consumer legislation.
"If 100,000 of you sign it, then Government will be pressurised to consider the issue for Parliamentary debate."
Little Mix tweeted: "Touts get in the way of music fans getting fair tickets Stop them & sign the petition".
The petition is headlined "Enforce the Consumer Rights Act to protect music, arts and sport fans from touts".
It states: "On a commercial scale, touting deprives the Treasury of VAT, and performance copyright holders of royalties that should be paid on the mark-ups. It also denies artistes the ability to ensure their events are priced so anyone can attend."
A Department for Business Innovation & Skills spokesman said: "In the Consumer Rights Act, the Government committed to an independent review of online secondary ticketing.
"The review has been considering a wide range of stakeholders responses to consider how best to represent consumers' interests. We are expecting the review report in late May 2016."