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my @sources = ( 'artist 1', 'artist 2', 'whatever' );  ### we make an 
+array first...
my @values = map { s/([_%])/\\$1/g; "%$_%" } @sources;  ### ...to avoi
+d an error here
...

my $sth = $dbh->prepare( "SELECT * FROM Songs where ($like_clause)" );
$sth->execute( @values );