Stevie Nicks and Lindsey Buckingham seem to be teasing a project after posting coordinated Instagram updates with the lyrics to "Frozen Love." Days later, a billboard with their portrait popped up in Los Angeles with the date Sept.

The sound of Stevie Nicks and Lindsey Buckingham’s voices might be back to haunt fans as the Fleetwood Mac stars tease what’s hoped to be a reunion. On Thursday, both the “Gypsy” crooner, 77, and the 75-year-old guitarist posted apparent call and response messages on Instagram.

Shortly after Stevie Nicks posted a lyric from the Buckingham Nicks song "Frozen Love," Lindsey Buckingham finished the sentiment.