NBC is not in the business of squandering a key time slot in the wake of Kelly Clarkson 's departure ... and TMZ has confirmed the network is taking a "hard look" at Kelly's replacement this week -- namely, Pink . As one source connected to the show tells TMZ ... "Pink has what it takes" ... meaning she has the skill set to do an hour-long interview show. Most importantly, the source says, she's "natural and friendly." Sources connected to the show say the show's staff loves Pink and are