Katy Perry ‘s relationship with Orlando Bloom appears to be going from strength to strength, with the pair celebrating her birthday in West Hollywood on Thursday night.

The singer showed off her svelte body in a very revealing skin-tight pink Vex latex dress.

“Orlando was seen walking into the restaurant with a bouquet of flowers in a vase,” a source told E! News .

“They were in a very happy mood, smiling a lot.”

Katy chose to wear a skin-tight latex dress during dinner

The American Idol judge looked sensational as she left Barton G

Cameras also caught Orlando’s ex-wife Miranda Kerr handing over a bag of gifts and a bouquet of pink and white roses to his girlfriend Katy.

Miranda, 35, was waiting outside the restaurant in a brand new Aston Martin to pick up her adorable seven-year-old son Flynn, who had joined dad Orlando, 41, to celebrate with Katy.

And Katy appeared to approve of Miranda’s new set of wheels.

She was overheard commenting: “What the heck is this car?!”

She joked to Miranda: “Who are you?!”

Katy then turned her attention to Flynn, saying: “I love you Flynnie, we’ll see you on Saturday, right?”

And as she left, she added: “Love you, Flynnie. Thank you for coming.”

Orlando added: “I love you, son. Bye baby boy. Thanks for coming.”

American Idol judge Katy is said to have a “great relationship” with Miranda, who tied the knot with Snapchat CEO Evan Spiegel after splitting from Orlando in 2013.

Another source told E! News: “Katy has a great relationship with Miranda and Evan. She is very close to Flynn and has been a constant in his life the last several years.

“She’s always around at his activities and parties. She’s great with him and they are extremely comfortable together.”