Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Region | Date | Format | Label | Edition |
| --- | --- | --- | --- | --- |
| United States | September 23, 2008 | CD , digital download | Hollywood Records | Standard |
| Canada | September 23, 2008 | CD , digital download | Hollywood Records | Standard |
| Japan | February 18, 2009 | CD | Avex Entertainment | Standard |
| United States | March 31, 2009 | CD | Hollywood Records | Deluxe |
| Canada | March 31, 2009 | CD | Hollywood Records | Deluxe |
| United Kingdom | April 16, 2009 | Digital download | Universal Music Group | Standard |
| Australia | April 19, 2009 | Digital download | Hollywood Records | Standard |
| United Kingdom | April 20, 2009 | CD | Polydor Records | Standard |
Question:
What format was released April 16, 2009?
Answer:
Digital download