Taylor Swift surprised fans with the appearance of fellow pop singer Katy Perry in her latest music video 'You need to Calm Down'.

Impossible Foods, which makes a meatless plant-based burger and is backed by celebrities like Serena Williams and Katy Perry, said it has raised $300m (€267m) in the latest round of funding ahead of a possible initial public offering.

The Mullingar native opened the Flicker sessions in Killarney INEC on March 10.

Conor McGregor became a father, Niall Horan saw his solo career take off, and Saoirse Ronan was an award-winning Ladybird. Those were some of the positives celebwise in 2017, writes Kelly O’Brien.

From surprise comebacks to celebrity spats and unfortunate deaths, pop stars were never far from the headlines in 2017, writes Ed Power.

Kate Harrington, 27, is assistant trainer to her mother Jessica, who will have a strong team, headed by Gold Cup hero Sizing John, operating over the festive period. Kate is also a prolific winner as a jockey herself

Des O’Driscoll shares the latest entertainment news and his top tips for the week ahead

Initially created to combat alcoholism, the 12-step programme can help everyone according to Russell Brand’s new book, writes Suzanne Harrington

Katy Perry is being sued after a woman claims she lost one of her toes while working on the American singer's tour.

So far, the video has been live for eight hours and has already clocked up over 13m views.

Here's your lunchtime news bulletin.

"The old Taylor can't come to the phone right now".

Sounds like more of a school tour checklist to us.

Fans even had the chance to watch her sleep.

Katy Perry has said she is ready to put her long-running feud with Taylor Swift behind her.

Begs not breaking the news to Bernard Brogan.

The 32-year-old went on to ask everyone to make a physical connection with someone next to them and tell them that you love them.

Here's what you need to know.

The brother of Manchester suicide bomber Salman Abedi has been released without charge by police.

Ariana Grande has lead a host of big acts at the One Love concert to raise money for the victims of last month's bombing in Manchester.

One Concert....One Love.... One Manchester

Ariana Grande has visited young fans injured in the Manchester terror attack in hospital.

SHE FORGOT US!

Here's what you need to know.

Many believe she was making the attack all about herself.

From Glasto to Spain, there are a flock of festivals that could tempt you overseas in the coming months, writes Ed Power

Rihanna was a hot mess in CdesG. This dress looks like someone mutilated the perfectly decent floral upholstery of an entire living-room set.

Here's your lunchtime bulletin.

Felicity Jones wore Olivier Theyskens to the Three Empire Awards in London.

What are the latest whisperings from the world of showbiz? 

Will this year’s Academy Award winners use their moment at the microphone to talk politics? Suzanne Harrington provides some inspiration and takes a look at the best – and worst – protest speeches.

Roses are red, violets are blue and Valentine’s beauty is mostly pink. Rachel Marie Walsh picks some pretty buys for Tuesday. 

This is a trip tailored for kids, but naturally for the accompanying grand dads, grannies, mums and dads, uncles and aunts too.

Tens of thousands of women have amassed in Washington DC and other cities around the globe for marches aimed at showing US president Donald Trump they will not be silent over the next four years.

Brand, who was once famously married to Katy Perry, has kept his relationship with Laura on a low profile.

Donald Trump has vowed to spend some of the final hours of the presidential campaign in Democratic strongholds in a bid to pull off a shock in states that have not voted for a Republican in decades.

Donald Trump has pledged post-election lawsuits against every woman who has accused him of sexual assault or other inappropriate behaviour.

ARLENE PHILLIPS could return to Strictly Come Dancing, according to reports.

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Hackers appear to have targeted comedian and Ghostbusters star Leslie Jones after it was reported that explicit photos of the actress were posted online.

Friends star Courteney Cox may have an affection for the Emerald Isle through her Irish fiance, but don’t be surprised if she’s in no rush to come back after what Bear Grylls put her through.

Singer Taylor Swift has topped this year’s Forbes list of the world’s 100 highest paid celebrities, earning $170m (€153m) mainly thanks to her hugely successful 1989 world tour.