TeeTree online store

An online store, selling great Tshirts with a wide range and huge number of designs that range from casual/cool to adventure to funny and colourful . Will appeal to teenagers right through to mature adults. Male and female. Prices will be lower than most Tshirt retailers.
The TeeTree logo should be colourful and fun but at the same time professional.
I would like a logo as well as a catchy, brief slogan.