Green was a hot topic, not only for Obama. At a Q&A session moderated by GRAMMY Museum executive director Robert Santelli, Timberlake recalled one of his favorite memories of the annual music awards show.

The 32-year-old entertainer said he was asked to perform a song at the last minute at the February ceremony. After recruiting Keith Urban and Boyz II Men for a song, Timberlake said he tried to contact Green to join them, but was unable to reach him. Suddenly, Green came running into the rehearsal clad in a mink coat, said Timberlake. “He goes ... 'I’m sorry I’m late. They called me. I was in the tub,' ” recalled Timberlake.

“So not only am I taken aback from his entrance, but now I have a visual of a holy bath full of bubbles and the Rev. Al GreenAl GreenBlack lawmakers launch ‘root out racism’ campaign vs. Trump House Dem introduces measure urging Trump undergo mental exam Dem to introduce impeachment articles over Charlottesville MORE gets a phone call. And he runs into his closet — because this is how my sketch comedy mind works — he runs into his closet like Clark Kent and comes out like Superman,” Timberlake said to laughs from the crowd.

The workshop came as a precursor to a Tuesday evening event featuring performances from the workshop’s musicians. The event will be live-streamed and filmed for a broadcast of “In Performance at the White House” on PBS stations on April 16.