00s acoustic acoustic rock adult alternative alternative alternative pop alternative rock amazing american awesome ballads blues blues rock blues-rock britpop calm chill chillout cool cute easy listening emo favorite favorite artists favorites female vocalists folk guilty pleasure guitar guitar virtuoso hip-hop hot indie indie rock jack johnson jazz john mayer love male male singer-songwriter male singer-songwriters male vocalist male vocalists mellow metal michael lewis pop pop rock pop-rock relax rock sexy singer songwriter singer-songwriter slow smooth soft rock soul sweet usa