O.A.R. returns to Penn’s Peak at 8 p.m. Sunday with “The Just Like Paradise Tour.”

The band first began to develop its unique sound while in high school in Rockville, Maryland. With three albums under their belt before they finished college, O.A.R. began pursuing their musical dreams full time in the summer of 2001.

By the end of 2008, they had released six studio albums and three live double disc CDs.

To date O.A.R. has sold close to 2 million albums and more than 2 million concert tickets, including two sold-out shows at New York City’s Madison Square Garden and Red Rocks Amphitheater in Colorado.

O.A.R. has performed on such national TV shows as “The Today Show,” “Live with Kelly and Michael,” “Conan” and 2015 Special Olympics Opening Ceremony.

In 2015, they performed in New York City’s Times Square New Year’s Eve Celebration to a live audience of over 1.5 million plus their concert was broadcast in a worldwide webcast reaching millions of fans.

What’s coming up at the Peak

• Friday, Bill Engvall, 8 p.m.

• Saturday, Ryan Pelton, 8 p.m.

• Sunday, O.A.R. 8 p.m.

• Dec. 28-29, Get the Led Out, 8 p.m.

• Jan. 18, Voyage, 8 p.m.

• Jan. 25, Phil Vassar, 8 p.m.

• Jan. 31, Greensky Bluegrass, 8 p.m.

Tickets for all concerts are available at Ticketmaster outlets, the Penn’s Peak Box Office and Roadies Restaurant and Bar. Penn’s Peak Box Office and Roadies Restaurant ticket sales are walk-up only, no phone orders.

For more information, visit www.pennspeak.com or call 866-605-7325.