As of July 2011 52 are in service.
18THIS ANSWER WAS ADDED APRIL 2 2011THIS AMOUNT CAN CHANGETHIS IS HOW MANY A380s ARE IN THE WORLD IN APRIL 2 2011
They couldn't have, because no runways in Berlin were long enough.
A-380 Family: TOTAL ORDERS: 198 TOTAL DELIVERIES: 13 IN OPERATION: 13 as of today.
52 A380's have been delivered or are in service in 2011
There is a difference between the number in service and the number that are fully built but are undergoing flight testing. So as for the number in service (As of July 2011) there are 53 (Including the 1 Airbus test frame). The number that exist is larger than this.
101 built as of March 2013
Jetstar currently (April 2011) have 59 aircraft in their fleet. 44 Airbus A320-200s, 6 Airbus A321-200s and 9 Airbus A330-200s.
[Maybe 3 or 4 or 5 between these figures.]
12
There are many different Airbus aircraft. Specify one.
As of 23/10/2015, Virgin Atlantic has 39 aircraft in service.10 Airbus A330-30011 Airbus A340-60011 Boeing 747-4007 Boeing 787-9
there are 4 engines on a380 airbus