Chris Willman Senior Music Writer and Chief Music Critic It’s hard to quite think of someone who was as big a veritable child star as Brenda Lee was in the late ’50s and early ’60s a “late bloomer.” Nor can “Rockin’ Around the Christmas Tree” really be considered an underdog song, after its accrual of quintuple-platinum sales over the decades. And yet it’s spent the last several years peaking at No. 2 each December, after spending most of its lifetime not annually charting at all.