It’s Taylor Eigsti.

Now, Glasper did co-produce her Lost and Found album, which is where her cover of the MJB track appears. Glasper also played rhodes on another song on that album.

Pianist Aaron Parks played keys on the In A Dream album.

Speaking of Glasper, I purchased Double Booked from Moods Music. That’s why I figured dude would be familiar with Gretchen. She’s also worked with Glasper bandmate Derrick Hodge.