Now through 2:59pm on Tuesday, April 3, 2018, tune into Highway 98.9 on the following days: 1) Tuesday, March 27; 2) Wednesday, March 28; 3) Monday, April 2nd; and 4) Tuesday, April 3rd, between the hours of 10am and 3:00pm, and listen for the cue to call 318-320-ROCK (7625).  Be the correct caller and win two free tickets to the Doobie Brothers concert on Friday, April 20th, at the Horseshoe Casino Riverdome in Bossier City.  One pair of tickets will be given away each day. Approximate prize value:  $155.  Must be 18 or over to win.  Tickets must be picked up by 5:00pm on Friday, April 20th, at the Highway 98.9 studios at 6341 Westport Avenue, Shreveport, LA, 71129.  For complete contest rules, click here.