Rihanna had Irish fans worried at a gig in Dublin on Tuesday night (21Jun16) after arriving 30 minutes late and then crying onstage.

The Umbrella singer took the stage at the Aviva Stadium for the start of the U.K. and Ireland leg of her Anti tour and appeared visibly upset about something as she performed her opening number, Stay.

She then started crying while singing her second track, Love the Way You Lie.

Rihanna offered no explanation for her late arrival or her tears and proved she's the consummate professional by soldiering on with the show and belting out a total of 24 tunes.

It seems her Irish fans picked her up and she took a moment during the show to tell the crowd, "I only have ever in my life heard an audience of people scream so loud that they sound like one voice and that only happens in Ireland, in Dublin... Thank you so much."

Rihanna has quite a lot going on in her personal and professional life at the moment including ongoing rumors she's dating rapper Drake and the fact she has just bought her dad a house in Barbados.

She has also just returned to the U.K. top five with her new Calvin Harris collaboration This Is What You Came For and launched a new perfume, called Crush.

The bad news is Rihanna is facing legal action from a Nigerian concert promoter amid allegations she scrapped a 2013 performance - and kept her hefty fee.

Megalectrics boss Chris Ubosi claims he arranged the gig for May, 2013 with two people who introduced themselves as representatives for Rihanna, Jay Z, and his Roc Nation firm. The two parties struck a deal for the Diamonds hitmaker to perform a 65-minute set for $425,000 , and Ubosi made three early payments, totalling $160,000 .

He then received a request from Rihanna's team seeking to postpone the show, which Ubosi agreed to, as long as the pop star publicized the new date on her social media accounts, reports TMZ.com. The rescheduled concert never materialized, and now Ubosi has filed suit against the two stars and Roc Nation executives in a bid to reclaim his funds after his initial requests went unanswered.