According to People Magazine, the 2016 Budweiser All-Star Concert series will feature performers Gwen Stefani, Tori Kelly, and OneRepublic. The concerts will be spread out over two days during the weekend prior to the All-Star Game.
On Friday, July 8 at 7 p.m. Pacific time, OneRepublic is scheduled to perform along with Needtobreathe. On Saturday the 9th, Tori Kelly and All Time Low are slated for a noon performance, with Gwen Stefani and Eve wrapping up the series at 7 p.m.
As of the time of publication, it appears that no official announcement regarding the concert performers has yet been made by Major League Baseball.
UPDATE (4:27 p.m.): MLB has confirmed the lineup via Twitter (see below) and on its website.
— All-Star Game (@AllStarGame) June 16, 2016