My first thought was “go for it”. As others have said, just don’t make a habit of it. You need to establish a track record of dependability.
HR is paid to play mind games with employees. They have no qualms about laying someone off when they’re told to but they pretend it’s a personal affront when an employee makes a move that is in his own best interest.
The people you need to care about are your immediate supervisors and coworkers. They’re the ones who will play a significant role in shaping your reputation in the industry in years to come. Genuine regret and setting up your departure in a way that minimizes the inconvenience to your peers and bosses is key.
One comment on the ‘celebrity’ thing: if your potential new boss is a singer/performer, do not be tempted to ease the departure from your current job with promises of show tickets. People will (jokingly or not) ask for tickets or autographs when you tell them about your big opportunity. Take it from someone with real world experience in this area: respond with an earnest “I have no idea if I can do that but I will if I can.” …or something along those lines. Then, after you are settled at your new job, remember to follow up with something nice if the opportunity presents itself.