Sergio Blass
...that Sergio Blass was the only singer to be a member of both Los Chicos and Menudo, Puerto Rican rival boy bands during the early 1980s?
...that <b id="mwAew"><a class="mw-redirect" href="./Sergio_Blass" id="mwAe0" rel="mw:WikiLink" title="Sergio Blass">Sergio Blass</a></b> was the only singer to be a member of both <a class="mw-redirect" href="./Los_Chicos" id="mwAe4" rel="mw:WikiLink" title="Los Chicos">Los Chicos</a> and <a class="mw-disambig" href="./Menudo" id="mwAe8" rel="mw:WikiLink" title="Menudo">Menudo</a>, <a class="mw-disambig" href="./Puerto_Rican" id="mwAfA" rel="mw:WikiLink" title="Puerto Rican">Puerto Rican</a> rival <a href="./Boy_band" id="mwAfE" rel="mw:WikiLink" title="Boy band">boy bands</a> during the early <a href="./1980s" id="mwAfI" rel="mw:WikiLink" title="1980s">1980s</a>?