 10 is a greatest hits album by American Christian rock band MercyMe . Released on April 7 , 2009 in commemoration of the tenth anniversary of the band 's single " I Can Only Imagine " . The album contains twelve of the band 's number @-@ one singles from five studio albums ( Almost There , Spoken For , Undone , Coming Up to Breathe , and All That Is Within Me ) as well as a re @-@ recording of " I Can Only Imagine " featuring the London Sessions Orchestra , in addition to two other bonus tracks . Additional content , which varies depending on the version of the album , includes music videos , featurettes , and live recordings . 
