Chris Young and Cassadee Pope make a great pair on their song "Think of You," and now, they've got hard evidence: The single recently reached No. 1 on the charts.

"Think of You" landed in the top spot on the Billboard Country Airplay chart, becoming Young's eighth No. 1 hit. The song is also Young's fastest-rising single so far in his career.

“I remember having 15-week songs that didn’t break the Top 40,” Young tells the Tennessean of the song's success. “It’s just incredibly fast. It’s a really, really cool feeling.”

“Think of You” is the second single off of Young’s newest album, I’m Comin’ Over; it follows his No. 1-reaching first single, also titled “I’m Comin’ Over.”

As for how Young and Pope got together? Young says that after seeing Pope perform at an acoustic radio station event, he knew he wanted her on the song.

“She’s definitely somebody that can sing her butt off,” Young tells The Boot. “And that was really the defining thing in me wanting to ask her to do a duet: she has an amazing voice. She’s an amazing artist.”

"Think of You" and the rest of I'm Comin' Over are available on iTunes. Pope, for her part, is preparing a new EP, Summer, set for release in early June.