Full list of all 70 Lips achievements worth 1,750 gamerscore.
The base game contains 40 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 30 achievements worth 750 Gamerscore.
Sent a song challenge to a friend for the first time
Got 20 challenge wins
Earn a Bronze Cup or better on 1 song
Earn a Bronze Cup or better on 20 songs