Why he'll survive... Vinny is the youngest and quietest member of the Jersey Shore. With his boyish charm, and smaller muscles, the other tributes might not label him a threat and forget he exists, thus allowing him to live long into the games and win.
Why he'll die...With his boyish charm, and smaller muscles, the other tributes will label him an easy target and pounce all at once.
Why she'll die... When Ronnie scouts out another tribute to kill, Sammi will mistake his scouting for flirting, burst into tears and run away... right into another tribute.
Why he'll survive... Ronnie is buff! Plus he'll have Sammi as his ally! There are few tributes this man of brawn can't take down.
Why he'll die... After his alliance with Sammi breaks he'll completely forget that he's NOT supposed to eat the berries. Oops!
Why she'll die... She'll forget who her allies are/piss off her allies/get pissed off by her allies and kill the wrong person, thus causing every other tribute to turn on her and kill her. If she should survive this Angelina-cide, her big mouth/trail of trash will lead the other tributes to her camp.
Why he'll survive... Like Ronnie, Pauly is pumped and if he can grab the DJ equipment from the cornucopia first, he'll create enough trance music to distract the tributes while he goes in for the kill.
Why he'll die... Forming an alliance with another tribute, he'll realize too late that this "stage five clinger" is slowing him down and alerting the others to their location.
Why she'll die... The gamers will lure her to a feast with the smell of pickles, after gorging she'll promptly fall asleep. Forever.