On "Valentine, " based on "My Funny Valentine, " Mr. Thaws raps over a loop of Chet Baker singing the song's title until Ms. Belmonte enters to singa new lyric and melody.
In his statement, which was repeated by the state-run Xinhua news agency, Mr. Wang said Mr. Buffett would singasong and play guitar in the online version of this year's Spring Festival gala.