  We present the differential rates for exclusive $\Bbar\to X \ell_1 \ell_2$,
where $\ell_1$ is a charged massless lepton and $\ell_2$ is a charged or
neutral massless lepton, and $X$ is a mesonic system up to spin 2. The cases of
interest are semileptonic (SL) $\Bbar\to \xcu\ellm \barnuell$ decays, and
$\Bbar \to X_s \ellm \ellp$ where the the di-lepton can be $c \bar{c}$
resonances or non-resonant electroweak penguins (EWP). We consider helicity
amplitudes having non-zero relative phases that can be potential new sources
for CP-violation. Our motivations for these additional phases include a complex
right-handed admixture in the hadronic weak charged current for the SL decays
and complex Wilson coefficients in the effective Hamiltonians for the EWP
decays. We demonstrate the efficacy of a novel technique of projecting out the
individual angular moments in the full rate expression in a model-independent
fashion. Our work is geared towards ongoing data analyses at $\babar$ and LHCb.
