50 Cent did release some music through Interscope Records in the last 5 years.
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16 Things You Didn't Know 50 Cent Had Done Since His Last Album Release

9. 50 Cent did release some music through Interscope Records in the last 5 years.
'The Lost Tape' was released through the record company in May 2012 as a promo for his fifth studio album 'Street King Immortal' (which never came). It features big names Eminem, Snoop Dogg, 2 Chainz, newly signed Kidd Kidd and loads more.