Adele surprised and delighted her audience at Dublin's 3Arena on Saturday when she performed with singers Ronan Scolard and Glenn Murphy, who just days previously went viral online after posting a video of them performing some of her biggest hits.

The duet video of them singing a medley of Adele's singles quickly went viral this week, amassing millions of views, and at her second sold-out gig at the 3Arena she invited the guys on stage to perform with her.

The performance went down a treat and the audience gave them a heartfelt standing ovation. 

Fans were left equally emotional, uplifted and overjoyed at having seen the star belt out her hits live at her first sold-out gig on Friday.

The singer, who was spotted out and about around the city with her 3-year-old son Angelo ahead of the gig, opened the show with a stunning rendition of Hello, before closing off with an energetic and powerful Rolling In The Deep.

During the concert, Adele showcased hits Someone Like You, Set Fire To The Rain, her new single When We Were Young and her Oscar-winning Bond theme tune Skyfall, as well as performing a selection of tracks spanning her three studio albums.

Adele also gave a shout-out during her set to Voice of Ireland winner Patrick James who she had invited to the show as her guest when she found out via Twitter that he had been unable to secure tickets to see her show.

James wrote on Twitter: "I've followed @Adele since MySpace & have seen her live every time she's played Dublin, but don't have a ticket for this weekend [sic]".

It didn't take Adele long to spot Patrick's tweet, responding to say, "I'll sort you out my love. Can't have you missing this one x [sic]."

Tweeting after the concert, James expressed said that Adele had made his dream come true, "Thank you @Adele not only have you made my dream come true by replying to me you have given me tickets & mentioned me at your gig! #LUCKY

During her performance of Hometown, aerial images of Dublin appeared on screen behind her

Adele's stage show was simple and pared back, with all focus on her vocals

Fans have been taking to social media to share their experiences on the night, with many breaking down in tears during certain songs, hailing is at the best concert they have ever been to and generally sharing the love with the London-born singer.