JT stopped by the launch of mPowering Action, the joint effort of Timbaland and his wife Monique with the United Nations Foundation, held at L.A. Live's Conga Room on Friday.
Surprising the crowd with "Carry Out," his track with Timbaland, Justin commanded shrieks from the ladies in the house.
"Give it up for my big brother," Timberlake said of the mega-producer, "and we'll see you Sunday."
Timberlake will make his first televised performance in about four years Sunday evening at the Grammy Awards.
"As we've seen in the past, the Grammy stage can be a wonderful place for an artist to make a return to the spotlight," a rep from Billboard magazine told MTV.
Additional folks at the event, which promoted solutions for global causes like clean water, included Kellan Lutz, Nikki Reed and "New Girl" star Lamorne Morris.
Are you excited for JT's return? Tell us in comments.
More Celebrity Features on Yahoo!:
- Arts & Entertainment
- Justin Timberlake