PICTURES! Tonight's last Britain's Got Talent 2013 semi-final line up

It's the last of the semi-finals on Britain's Got Talent 2013, and it's arguably the toughest heat yet.

So far eight acts have made it through to the final, leaving just two spots left for this evening's last nine performers.

As usual, each act will get just one chance to wow the judges and the public, before us viewers decide the top three.

The most popular act with the public will go straight through to next weekend's final, while the next top rated acts will have their fate decided by the judges.

This evening's last semi-final is a real mixed back, with singer Aliki Chrysochou, shadow performers Attraction, dancers CEO Dancers, musicians Duelling Pianos, the ultra camp Glambasadors and youngster Jordan O’Keefe.

Bringing some variety are keytar king Maarty Broekman, ventriloquist Steve Hewlett and gospel choir The Voices of Incognito.

The live semi-final starts, as always, at 7PM on ITV.

Browse pictures of tonight's BGT semi-final line up below...