's seal of approval on startup app Stamped
has skyrocketed it in the Apple App Store. Bieber tweeted his 26-plus-million Twitter followers and the ripple effect was contagious. However, there are many high-profile investors behind the app, which was created mainly by former Google employees. The New York Times, Ellen DeGeneres
and Ryan Seacrest
all believe in the app enough to put their money where their mouth is.
What do ...