Jack Pack

Name: Jack Pack

Age: 24-33

Act: The swing band made up of Alfie, Adam, Andrew and Sean have set hearts racing performing classic Rat Pack tracks.

BGT Tweets: Celebrity BGT banter

The semi-finals are over and we have two new acts ready to fight for the title of Britain's Got Talent winner on Saturday.

Jack Pack and Paddy & Nico were the big news of the night, but what elese where the celebrities chatting about online? Take a look.