Question: Which artists recorded both "Love Letter" and "Face?"
Sentence (from "Happy Pledis 2nd Album"): Happy Pledis 2nd Album is a charity single by the South Korean music label Pledis Entertainment's artists Son Dam-bi, Kahi, After School, NU'EST's JR and Baekho, Hello Venus's Yoo Ara and Lime and Pre-School Girl Park Jung-hyun.
Relevant evidence: Yes