"Singer Adele arrives for the Brit Awards 2012 at the O2 Arena in London.  Four years after her last album, the singer appears to have teased British television viewers with a snippet of new music, broadcast during an ad break on prime-time TV. The 30-second ad shown Sunday evening, Oct. 18, 2015, during TV talent show ""The X Factor"" featured Adele's distinctive tones over a black screen on which heartache-filled lyrics appeared.      FILE - In this Feb. 21, 2012 file photo (AP Photo/Jonathan Short, File)"
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