PLEASE NOTE: EDIT CONTAINS CONVERTED 4:3 MATERIAL<br/> <br />Barbra Streisand sings for Oscar.<br/> <br />The 70-year-old has joined the lineup of performers at the 85th Academy Awards.<br/> <br />Producers announced the two-time Oscar winner will perform during the show, but did not say how her appearance will tie into the Awards ceremony or what she will sing.<br/> <br />The Oscars will be presented at Hollywood's Dolby Theatre on February 24th and will be broadcast live, worldwide.
