The 18-year old was told she was "not strong enough" to have her own show...Selena Gomez has revealed that she was once told by a casting director that she was not "strong enough" to front her own TV show.Gomez, who is said to be dating teen heartthrob Justin Bieber, claims that before landing the lead role of Alex Russo on hit Disney series, Wizard of Waverly Place, she was rejected by the