For Jessie J is Masterpiece with 21k
For Nicki it's Trini Dem Girls with around 3k after The Pinkprint was released. 9k after it was released as a single.
For GLX, the Say Something (Xtina mix) 1st week sales were 189k.
Xtina's "Say Something" first-week sales were 162,500. The total sales for the song in its debut were 189,000 but Christina's duet version accounted for 86% of it. 26,500 copies were the original version.
Bruno Mars - UpTown Funk! (54,000)
Taylor Swift - Bad Blood f/ Kendrick Lamar (385,000)
The Weeknd - Can't Feel My Face (93,000)
Ariana Grande - One Last Time (idk)