  Studies of semileptonic decays of b hadrons with the LHCb experiment are
reported. In particular, measurements of the b hadron production fractions at
the LHC and Bs semileptonic decays in P-wave charmed mesons are presented. An
outlook of the LHCb potential in measuring the CKM matrix elements Vub and Vcb,
as well as decays involving taus, is given.
