Some interesting outfits on display...published at 22:39 Greenwich Mean Time 6 February
Jude McCann
BBC Sport NI at SSE Arena
Wouldn't be a night of darts without the iconic traffic cone costume.

Luke Humphries wins opening Premier League night in Belfast with 6-1 win over Chris Dobey
Semi-final results: Dobey 6-4 Cross; Van Gerwen 5-6 Humphries
Quarter-final results: Dobey 6-4 Price; Bunting 4-6 Cross; Littler 5-6 Van Gerwen; Aspinall 2-6 Humphries
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Sam Drury and Frank Keogh
Jude McCann
BBC Sport NI at SSE Arena
Wouldn't be a night of darts without the iconic traffic cone costume.
Andy Gray
BBC Sport NI
"Sometimes the people at home just see you throwing darts and that's it. There's a lot more that goes into it."
The glamour, fame and financial rewards - there's never been a better time to be involved with darts as the sport continues to grow at a rapid rate.
But there's a lot that goes on behind the scenes for players to make it to the top of the game.
Results: Van Gerwen 5-6 Humphries
Michael van Gerwen had the edge on the averages, 101.51 to Luke Humphries 99.31.
He also had three 180s to Humphries' one but his doubling cost him.
While Humphries was 54.5% on the outer ring, Mighty Mike was down at 31.3%.
Van Gerwen 5-6 Humphries
Luke Humphries squeaks through to the final!
Michael van Gerwen had a dart at bull to win it. But he missed and Humphries came back, hit double 16 and will play Chris Dobey in the final.
MVG will be wondering how he lost that one, he was dominating at one stage but poor finishing when 4-3 up let Humphries back in and the Englishman is good enough that if you give him a chance, he will take it.
Van Gerwen 5-5 Humphries
Dan Dawson
Commentator on Sky Sports
It is a one-leg shootout for the final.
Van Gerwen 5-5 Humphries
Michael van Gerwen does what he has to do.
He holds and we've got one leg to see who goes through to the final.
Luke Humphries has the darts...
Van Gerwen 4-5 Humphries
Luke Humphries takes out 120 and is on the brink of victory!
How has Michael van Gerwen let that happen? The Dutchman was in complete control but that messing around on the doubles in the last leg has put him right up against it.
It's a 15-darter for Humphries with MVG a long way back.
You go through every emotion as a spectator at the darts...
As broadcaster Colin Murray demonstrates.
Van Gerwen 4-4 Humphries
Luke Humphries was able to have a couple of off legs in his quarter-final against Nathan Aspinall, it hasn't been the case in this match... until now.
Michael van Gerwen misses countless darts at double, including double one when he gets down to it, and Humphries hits double four to break.
MVG should be a leg away from the final.
Van Gerwen 4-3 Humphries
From 3-1 down, Michael van Gerwen leads 4-3!
It's magnificent darts from the Dutchman to break. Just two darts needed to take out 64.
A 14-darter and Van Gerwen is really on it now.
Van Gerwen 3-3 Humphries
Brilliant scoring from Michael van Gerwen and after a 133 leaves him 100, he can take his time with Luke Humphries lagging slightly behind.
Tops secures the leg and we're all square again.
Van Gerwen 2-3 Humphries
Immediate response from Michael van Gerwen.
It's double 16 for a 15-dart break of throw.
Luke Humphries has the darts in the match so Van Gerwen really needed that break.
Van Gerwen 1-3 Humphries
Wayne Mardle
Former World Championship semi-finalist on Sky Sports
That is just so good, it's too good. And the important thing is it's a break of throw.
Van Gerwen 1-3 Humphries
Stunning from Luke Humphries.
Michael van Gerwen is sitting happily with 32 remaining, only for Humphries to take out 140 in a flash.
Two trebles 20s then double 10 to break. Made to look so simple by the world number one.
Van Gerwen 1-2 Humphries
Michael van Gerwen puts the pressure on with his second 180 of the match.
The Dutchman has a dart at bullseye to break after Luke Humphries misses double 18 for a 150 checkout.
Humphries eventually holds when he hits double nine at the third attempt.
Van Gerwen 1-1 Humphries
Michael van Gerwen is quickly back on terms.
He, too, finishes on tops and gets it at the second attempt for a 14-darter.
Van Gerwen 0-1 Humphries
Strong start from Luke Humphries as he hits a pair of 140s on his way to a 13-dart hold.
Tops seals the leg.
Van Gerwen v Humphries
Two crowd-pleasing walk-ons done, we're just about ready to go...
Van Gerwen v Humphries
Who's ready for our second semi-final?
This one should be a cracker!
Result: Dobey 6-4 Cross
A match that veered between the sublime and the ridiculous, with a large dose of sloppiness mixed in.
Chris Dobey won't mind now, his average of 92.69 with four 180s, and 35.3% on the doubles is enough to see him through.
For Rob Cross, an average of 89.55 and 28.6% on the outer ring means he won't be surprised not to have made it through.