Hours before the Baltimore Ravens and the San Francisco 49ers faced off in Super Bowl XLVII Sunday night, two American superstar vocalists took the stage at Symphony Hall. It wasn’t a case of dueling divas, however: Soprano Renée Fleming and mezzo-soprano Susan Graham hugged a lot, and they complemented rather than competed with each other.

Both were in glorious voice; there wasn’t a single power outage. What’s more, as Graham remarked in a pointed reference to Beyoncé’s Inauguration performance before the fourth and final encore, “I guarantee you we have sung every note live.” In the end, this Celebrity Series event was a super show in which there were no losers.