Here is the full list of all 38 Let's Sing 2016 (UK) trophies - there are 20 bronze, 13 silver, 4 gold and 1 platinum.
Obtain all the NOW That's What I Call Sing trophies
Unlock all the game modes for all songs
Finish 150 songs
Pass the mic 30 times in Pass the mic mode
Accumulate 500 VoxPoints
Finish 90 songs
Finish a song in Elimination mode
Start Elimination mode
Finish with a similar score to your partner in Duet mode
Start Duet mode
Get over 120,000 points
Finish 5 songs without the vocals
Browse through the song covers 3 times in less than 20 seconds
View all the credits
Sing 3 songs in a row from before 2008
Start Pass the Mic mode
Get a score inferior to one point
Finish a song in 20,000! mode in under 60 seconds
Start 20,000! mode
Sing all the songs
Finish 40 songs
Get between 50,000 and 51,000 points
Listen to 10 songs in a row in Jukebox mode
Finish 15 songs in a session
Accumulate 100 VoxPoints
Hit all the golden notes in a song
Accumulate 50 VoxPoints
Finish a song in Expert mode without the vocals
Get 500 'PERFECT'
Unlock all the game modes for a song
Get 10 'PERFECT' in a row in Expert mode
Start Expert mode
Get 'PERFECT' only for the parts of a song with no lyrics in By Heart mode
Sing 5 songs in a row released after 2013
Get over 100,000 points
Start By Heart mode
Finish a song
Get over 80,000 points