What a *****! I bet Jamelia hasn't sung live every concert! Beyonce sings live I would say 90% of the time. Britney, well, what can you say? She's lost the plot totally, so who knows how much she sings or anything.
But I think famous people should not go about slagging eachother off like that. Christina Aguilera is enemies with everyone becasue she is constantly ripping on them. Jamelia better watch out or she'll be enemy #1.