Here is the full list of all 10 Let's Sing 2017 (UK) trophies - there are 4 bronze, 5 silver and 1 gold.
Sing 30 songs
Complete 25 missions
Complete 50 missions
Complete 100 missions
Get a record for 5 different songs
Get a record for 30 different songs
Get 10 diamond records
Reach level 4
Reach level 7
Reach level 10