Lady Antebellum has their first No. 1 tune in both the US and Canada this week, as I Run To You' ascends to the top spot in both countries, says theboot.com. The song, Lady A's third single, was co-penned by all three members of the group -- Dave Haywood, Charles Kelley and Hillary Scott, along with veteran tunesmith Tom Douglas.

"This is absolutely surreal," said Dave, from Boise, Idaho, today. "A No. 1 is something you never think will actually happen, and it is certainly something that we will never forget! We are so overwhelmed from the support of the fans and country radio, and we want to give a special shout out to Tom Douglas for pushing us as songwriters and challenging us to put these beautiful lyrics into a song."

'I Run to You' has also garnered more than 450,000 downloads and helped double weekly sales totals of the band's self-titled debut album, which also topped the charts and has been certified gold. The trio are the reigning ACM Best New Vocal Group and the CMA's New Artist of the Year, and they've scored three Grammy nominations and three CMT Award nominations.

They're not slowing down too long to celebrate as they are currently on the road with Kenny Chesney and are slated to join Keith Urban for their first Canadian tour later this fall.