  Using Gaia EDR3, we study the most spectacular and photogenic cluster of
Ptolemy. After deriving its membership, we identify in its colour-magnitude
diagram a star that definitively decided to straggle and dress in blue. Further
analysis with the FARCE telescope allows us to discover in its light curve the
secret of its rejuvenation, which we gladly share in this paper. This research
is an important contribution to attain the ultimate goal of astronomy as
professed by DJ Format.
