[Storms123]

Christine really can't/doesn't play anymore. I won't discuss her inability to carry a tune here.
Before the LB debacle, Brett Tuggle would have been there "backing" her up on keys and playing guitar (as he had been on tours before she came back) With Brett going with LB, Stevie brought in her keys player. There has always been another drummer behind the stage (with or without Taku) And don't forget, Stevie has been "helping" with percussion for years with those magnificent tambo skills--LOL.
Point being, the band, as do many bands, bring in backing musicians for support. Taku played on a tour while LB was still in the band.
Let's just be grateful they aren't lip synching like other musicians have taken too.