Katy Perry and John Mayer are believed to be dating again.

Katy Perry wants to keep her relationship with Diplo "private".

Katy Perry has hinted at being suicidal following her divorce from Russell Brand.

Children’s heart operations in Ireland are set to be delivered on a cross-border basis from a single surgical centre in Dublin, it has been announced.

Almost since coming to prominence, celebs have been quitting — and returning to — Twitter, says Jack Shafer.

KATY PERRY has said she is looking for a different kind of boyfriend as she heads into her 30s.

Katy Perry is planning to write a tell-all book.

Her new album 'Partners' is set to release September 15 this year.

Katy Perry says it's easier to date famous men.

Robert Pattinson is reportedly dating Katy Perry's best friend.

Katy Perry reportedly wants to have a baby.

Katy Perry is reportedly ignoring John Mayer.

Katy Perry is reportedly having hypnotherapy to get over John Mayer.

Miley Cyrus has slammed Katy Perry on Twitter.

Katy Perry broke up with John Mayer because he kept breaking promises.

US pop star Katy Perry was tonight crowned ‘Woman Of The Year’ at the 2014 Elle Style Awards.

Katy Perry has been spotted with a ring on her finger.

Taylor Swift will never pose naked for a photo shoot.

Learning to negotiate with your partner is an important skill.

The Eurythmics will reunite to honour the Beatles for a special TV performance.

Pop star Katy Perry said becoming a goodwill ambassador for the UN children’s agency has made her realise that there is more to happiness than material possessions and social status.

Jennifer Love Hewitt has given birth to a baby girl.

Katy Perry and John Mayer are planning to have children.

Miley Cyrus made her memorable red carpet appearance at the 2013 MTV Europe Music Awards, flashing the flesh in a backless mini-dress.

Can Twitter keep its 232m users from feeling bored?

Katy Perry wants Daniel Radcliffe to call her after the 'Harry Potter' star confessed to a crush on the 'Roar' hitmaker during a TV interview last month.

Taylor Swift doesn't think she'll have children.

Katy Perry had suicidal thoughts after splitting from Russell Brand.

The 'Roar' singer has obsessive compulsive disorder and finds herself inexplicably compelled to organise everything in alphabetical lists and eradicate all germs in her house with crazy cleaning rituals.

Katy Perry features on John Mayer's new album.

Pop star Katy Perry has denied rumours that she dated Robert Pattinson.

Katy Perry will be "honest" about her life on her new album.

Former child star and troubled actress, Amanda Bynes, has a penchant for calling people ugly — and many of them happen to be black. Allison Samuels on the lasting impact of Bynes’s Twitter abuse

John Mayer surprised a fan by purchasing her dream guitar for her.

Taylor Swift thinks writing about having her heart broken is good for her and her career.

Katy Perry's friends want her to date Robert Pattinson.

Katy Perry wants to find a man who will love her "in the right way".

Pop star Katy Perry has revealed that Russell Brand told her he was divorcing her in a text message.

Katy Perry hasn't heard from Russell Brand since he sent her a text message saying he wanted a divorce.

Katy Perry says that she cries all the time.

Jennifer Love Hewitt is engaged to Brian Hallisay.

Robert Pattinson and Katy Perry enjoyed a trip to Santa Barbara together over the weekend.

Justin Bieber and Selena Gomez are back together for a “trial period”.

Taylor Swift led the winners at the Billboard Music Awards last night, taking home eight prizes.