From NBC's Savannah Guthrie
According to a transition official, Obama today surprised Biden one day before his 66th birthday with cupcakes after their weekly lunch. He lit the candles on the 12 cupcakes and brought them over to Biden.
Obama joked, "You're 12 years old!"
Biden laughed, replying: "Maybe in dog years!"
Then Obama led the staff in singing Biden Happy Birthday. Obama also surprised him by giving him a Chicago White Sox hat, a Chicago Bears hat, and a bucket of Garrett's popcorn as gifts.