Simplify the following text for a Grade 6 native English-speaking person.
Original: Tt was released as the album 's leading single as a digital download to both iTunes and Amazon on April 22 , 2008 ( see 2008 in music ) , and was impacted to rhythmic\/crossover radio stations on June 24 , 2008 .
Simplified: The single was released as a digital download to both iTunes and Amazon.com on April 22 , 2008 .