Calum Scott and U.D.I. are the joint favourites to win Britain's Got Talent 2015.
The live semi-finals air all this week on ITV as the top 45 acts become just 10.
Simon Cowell's golden buzzer act Calum and light dancers U.D.I. are currently top of the betting at odds of 7/2.
It's a very open competition this year with choir Cor Glanaethwy, gospel choir Revelation Avenue and solo singers Emma Jones and Ella Shaw all also tipped for success.
Others in with a shot include Old Men Grooving, Boyband and Maia Gough.
However at the other end of the scale, comb player Narinder Dhani is given a 250/1 shot of winning the £250,000 prize money along with so-called magician entertainer Jeffrey Drayton.
Speaking ahead of the semi-finals, the BGT judges said they really couldn't call this year's competition.
Simon Cowell said: "I've got a feeling this year someone we’re not really focusing on or not expecting to will win.”
And Alesha Dixon agreed: “There are a lot of different acts. I don’t think you can call it on who will win.
“When attraction came on, we all knew they were going to win. It was a similar feeling with Ashley and Pudsey. This year, it’s more wide open.”
The Britain's Got Talent airs all this week on ITV from 7:30PM.
Each evening will see nine acts go head to head for two spots in next Sunday’s Britain's Got Talent 2015 final.
The act with the most votes from the public will go straight through while the judges will decide between the next two most popular acts with viewers.
Browse pictures of the Top 45 Britain's Got Talent 2015 contestants here...