Let It Shine continues tonight on BBC One and from the judges to the song choices here's all you need to know.
What is Let It Shine?
The new BBC One talent series follows similar previous musicals series with Andrew Llyod Webber, such as Any Dream Will Do and Over the Rainbow.
Fronted by Gary Barlow, Let It Shine will follow the hunt for singers to perform in a new stage musical based on the songs of Gary's band Take That.
The winners will perform in the production when it hits stages across the UK.
Who are the judges?
Alongside Gary, Spandau Ballet singer Martin Kemp and former X Factor judge Dannii Minogue will take up a role on the judging panel.
They were joined by guest judge, West End singer and star of Glee Amber Riley for the first stage of the competition while other guest judges will appear throughout the series at different stages of the competition. Lulu was seen earlier this month and Ricki Lake on last weekend.
Tonight's second live show will see Ashley Roberts join the panel while next weekend Robbie Williams is confirmed for the show.
Meanwhile, Graham Norton and Mel Giedroyc will be presenting Let it Shine
Let It Shine song list
Songs for the semi final!
Drive: 'Girls on Film' by Duran Duran
Iron Sun: 'Born This Way' by Lady Gaga
Nightfall: 'Without You' by David Guetta and Usher
Five to Five: 'Tell Her About It' by Billy Joel
How do the Let It Shine live shows work?
In the live shows it'll be the viewers who have the power, voting for their favourite after the bands perform live. The two bands with the least votes will perform again before being disbanded.
The judges will then pick the best individual five boys to reform into a new group to go through to the next week, while the other five will be sent home. Gary Barlow will act as head judge in case of any ties over who to save.
The band with the most members that go through will keep its name.
What time is Let It Shine on TV?
Let It Shine started on TV on BBC One on Saturday, January 7 at 7PM and will run for eight weeks.
The second live episode will air on BBC One tonight at 6:55PM while the results will air at 8:45PM.