This is an awesome song that sounds great sung with guitar. My first tab so feel free to 
critique. Thanks!

Tonight (Best You Ever Had)
John Legend

Capo on 3

Em (022000@1)                     CAin't (x32010@1)this what you came for
                         GDon't (320003@1)you wish you came, oh
                         DGirl (xx0232@1)what you're playing for
Em (022000@1)                       CCome (x32010@1)on, let me kiss that
                         GOoh, (320003@1)I know you miss that
                         DWhat's (xx0232@1)wrong, let me fix that

Twist that

C (x32010@1)           G (320003@1)     DBaby, (xx0232@1)tonight's the night I let you know
      C (x32010@1)           G (320003@1)     DBaby, (xx0232@1)tonight's the night we lose control
      C (x32010@1)           G (320003@1)      C (x32010@1)       GBaby, (320003@1)tonight you need that, tonight believe that
C (x32010@1)          G (320003@1)    D (xx0232@1)           EmTonight (022000@1)i'll be the best you ever had
              C (x32010@1)            GI (320003@1)don't wanna brag, but i'll be
    D (xx0232@1)           EmThe (022000@1)best you ever had
              C (x32010@1)            GI (320003@1)don't wanna brag, but i'll be
    D (xx0232@1)           EmThe (022000@1)best you ever had

CI (x32010@1)hit you with the best flow,
                     GFreestylin (320003@1)the breaststroke
                          DTil (xx0232@1)you blowing cigarette smoke
                     EmAnd (022000@1)now the bed's broke
                     CSo (x32010@1)what we gon' do now
                     GF-ck (320003@1)it, round two now
                          DWork (xx0232@1)it out, then we cool down, Cool down

C (x32010@1)           G (320003@1)     DBaby, (xx0232@1)tonight's the night I let you know
      C (x32010@1)           G (320003@1)     DBaby, (xx0232@1)tonight's the night we lose control
      C (x32010@1)           G (320003@1)      C (x32010@1)       GBaby, (320003@1)tonight you need that, tonight believe that
      C (x32010@1)           G (320003@1)      D (xx0232@1)  EmTonight (022000@1)i'll be the best you ever had
              C (x32010@1)            GI (320003@1)don't wanna brag, but i'll be
    D (xx0232@1)           EmThe (022000@1)best you ever had
              C (x32010@1)            GI (320003@1)don't wanna brag, but i'll be
    D (xx0232@1)           EmThe (022000@1)best you ever had...