Last night the lights of the Empire State Building were synchronized to give 60,000 fans at the sold out “Fare Thee Well: Celebrating 50 Years of Grateful Dead” concert (which was held in Chicago, not New York) a light show that they would never forget. The light show synchronized the Empire State Building’s LED tower lights to the band’s live performance of “U.S. Blues.”

The surviving members of the original band were reunited for the “Fare Thee Well: Celebrating 50 Years of Grateful Dead” tour 20 years to the day after the band’s last performance together.

New Yorkers will get an encore performance of the Empire State Building light show at 9:00 p.m. tonight. Fans can tune into iHeartRadio’s Q104.3 to listen along with the group playing live as they watch the show.