I always thought Tamar was a better singer than her sister Toni. But now I realise that just because Tamar has a more superior range does not necessarily mean she's the better singer. There's a difference. At times, Tamar has no idea how to use her very blessed instrument. She and Christina Aguilera are pretty much in the same boat. ‘Let Me Know’ isn't really doing much right now, but that's because Tamar isn't doing much to promote it. Perhaps it's time for Vince to get on the phone to Lady Gaga for that much needed promotional tweet.