One's a straight-talking rocker and the other's a glamorous R'n'B diva.
So it comes as no surprise that singers Dolores O'Riordan and Jamelia don't have much to bond over.
But the bickering judges will bury the hatchet on this weekend's episode of the Voice of Ireland over something they most definitely have in common -- motherhood.
While dad-of-one Kian Egan knows something about juggling a busy career with his son Koa, himself and Bressie are left out of this conversation.
Jamelia and Dolores realise that they can get along well during a chat over the struggles of being a working mum.
Cranberries frontwoman Dolores is full of chat about giving birth, but still going on tour, while single mum Jamelia admits she has to work hard to provide for her children.
How talk turns from music to babies is hardly surprising on a show that has proved to be a big fan of the topic.
Last year's runner-up Kelly Mongan, who had her baby just weeks after the show, proved to be the stand-out story of the competition.
This year Catherine Hughes (29) from Armagh is keen to prove that being pregnant shouldn't hold you back.
At 30 weeks, she is still going strong and hoping to progress in the competition.
There is also plenty of male charm hoping to win over the judges this week with one familiar face returning.
Dublin singer James Sheridan is back for more following heartache in the second series of the show when he was sent home during the battle rounds.
It remains to be seen whether Bressie will recognise his voice, but the 20-year-old will try to impress the judges with a rendition of Tic Toc by pop star Ke$ha.
Also this week, Rowell Villones, originally from the Philippines, arrives in the studio with a peculiar bow in his arrow.
Rowell (41), who has lived in Ireland for 12 years, can sing Danny Boy in Irish.