RihannaRihanna celebrated her 22nd birthday in style this past weekend at a surprise Phoenix bash thrown by her new beau, L.A. Dodger Matt Kemp. Kemp pulled out all the stops for the popstar, reportedly giving Rihanna a diamond necklace and setting up a soiree that included "Sprinkles cupcakes, tiki torches in the pool and engraved bottles of Ace of Spades champagne and Johnny Walker Blue, as well as a Jamaican chef who whipped up lots of appetizers for the crowd." The best part, however, appeared to be a special surprise that just proves good things definitely come in small packages. Watch the video after the jump.