After the conclusion of the first of leg of his "Happy Hour Tour," Uncle Kracker will be among the stars performing on Kid Rock's inaugural "Chillin' The Most Cruise." Already sold-out, the four-day fun-fest – slated for April 29th to May 3rd – will travel from Tampa, Florida to Grand Cayman on board the Carnival Inspiration, highlighted by round-the-clock concerts from choice artists and DJs, parties, activities, contests, and much more.

The tour comes as Uncle Kracker's current hit single, "Smile," continues to explode across a variety of radio formats. The track – included on "HAPPY HOUR," Uncle Kracker's latest album – has already reached #2 at Hot AC, where it remains a Top 10 favorite. What's more, "Smile" is now ascending the airplay charts at both Country and CHR/Pop, where it is now climbing the Top 40.

In addition, the track's companion video clip is in rotation at VH1, where it has been a fixture on the channel's VH1 Top 20 Countdown since its initial release last August. And as if all that weren't enough, the "Smile" ringtone is a Top 20 seller on this week's Nielsen RingScan's top-downloaded master ringtones chart.