Cello,Piano - Level 2 - Digital Download SKU: A0.1224464 Composed by Brian Dong Ho Lee, Hong Jun Park, Jeong Hun Seo, and Rebecca Rose Johnson. Arranged by Kaiserin Rebecca. Contemporary,Instructional,Pop. Score and part. 5 pages. Kaiserin Rebecca #820568. Published by Kaiserin Rebecca (A0.1224464). Don't Know What to Do by Blackpink. For cello solo and piano accompaniment with chords.Key: D major. Duration: 1'55.