Here is the full list of all 37 Just Dance 2020 achievements worth 1,000 gamerscore.
Complete your first song
Get 3 stars on 5 different songs
Perform all the Gold on a song
Perform only Good or better on any song
Get 20 Super or better in a row on any song
Get 10 Perfect in a row on any song
Get 3 stars on all songs (no Alternate, Kids or Just Dance Unlimited)
Reach Level 5
Reach Level 100
Change the alias of one of your Dancer Cards 20 times
Spend 1000 Mojos in the gift machine
Spend 10000 Mojos in the gift machine
Get all the gift machine rewards
Burn 302 kcal in Sweat mode in one session
Beat a Boss in World Dance Floor
Participate in a Tournament in World Dance Floor
Win a Team Battle in World Dance Floor
Complete 5 Daily Challenges
Complete one Challenge or more per day for 7 days
Score Superstar on a song
Score Megastar on a song
Score Superstar on all songs (no Kids or Alternate Version)
Score Megastar on all songs (no Kids or Alternate Version)
Dance to the first song of the All Stars mode
Dance to 5 songs in All Stars mode
Dance to the final song in All Stars mode
Score at least 3 stars on each song in All Stars mode
Score Superstar or more on each song in All Stars mode
Unlock your first Skin
Unlock 10 Skins
Unlock 20 Skins
Dance to a song with Coop Mode activated
Dance to 10 different songs with Co-op mode activated
Score Superstar with Co-op mode activated
Unlock your first Sticker
Unlock 60 Stickers
Unlock all the Stickers