Singer/Songwriter Brett Dennen, who not long ago treated the Jambands.com/Relix staff to rooftop performance in exchange for a nod in our On the Verge column, will make his national television debut late this Tuesday, January 15 (technically early Wednesday morning). Dennen will perform ‘Ain’t No Reason,’ the second single from his breakthrough album So Much More, on ABCs Jimmy Kimmel Live. ALO guitarist Dan Lebowitz, who has been on the road with Dennen for much of the past year, will back the singer/songwriter on the popular late night program. In the coming weeks, Lebowitz and ALO bassist Steve Adams will also spend some time out at sea with Dennen, supporting the guitarist on both The Rock Boat (1/19-23) and the Mayercruise (2/1-4). As for Adams, the bassist appeared on television this weekend, backing Sara Bareilles on the CBS Saturday Early Show.