Jennifer Nettles, the cheery voice behind crossover country hits “Stuck Like Glue” and “All I Want to Do,” has always seemed like Sugarland’s happy-go-lucky breakout star. This solo debut from the duo’s other half, Kristian Bush, might challenge that — it’s 12 songs about sunsets, beach trips and the people we enjoy them with. Even Kenny Chesney would be impressed by this guy’s all-smiles attitude. Where lead single “Trailer Hitch” finds Bush relinquishing all material possessions, “Giving It Up” suggests doing the same with your petty fears. On “Flip Flops,” he waxes sentimental about getting so drunk that he can barely stand up in his comfy summer footwear. The hangover never comes.