Charlotte Church has written an open letter criticising the Conservative-led government and backing Labour.
Writing on her website, former opera singer Church has urged Ed Miliband to be a "trailblazer in progressive politics" and argued that David Cameron has ignored pressing issues such as the poverty gap and the power of the media.
Church has urged people to engage with politics and said she believes that politicians try to control people by making them afraid.
"So much of the electioneering that those on the right have done has been based upon fear," she wrote. "Fear of immigration, fear of economic instability, fear of welfare claimants and the unemployed. The politics of fear is the politics of control...
"If the economic definitions of Left and Right are that the Left want to increase taxes and spend on public services, and the Right want to lower taxes and reduce spending on public services, then never has it been more glaringly obvious that the Rightwing getting their own way [sic].
"Multi-national companies are paying less tax than ever before, whilst the NHS has already been carved up and is primed to be sold off. The trickle-down economics that we have unwillingly propped up since the 60s is so far from functioning as to make it farcical."
Church had more choice words for Cameron's party, opining that: "David Cameron has presided over the most capricious, shambolic government that there has been in my lifetime. They are scandalous, and they cannot be the right people for the job."
She also had Ukip leader Nigel Farage in her sights, saying he "has got a romanticised view of the past".
Church added: "He wants to turn our future into: some Postman Pat paradise, where you know the name of the milkman; where you HAVE a milkman! It’s 2015, Nige!"
In recent years, Church has become a high-profile campaigner for press regulations. She called Piers Morgan a "pr**k" and said David Cameron was patronising when she met him for a meeting about phone hacking.