A truly sad occurrence inspires this opening to this thread,
referencing the Twitter account of Eliza Carthy MBE.
As you all know, her dearly beloved mother, Norma Waterson,
recently died of pneumonia complicated by COVID-19 at a ripe old age.

Peggy Seeger very recently presented a concert in the UK,
her son Calum McColl accompanied her.
Ms. Seeger knew well, and loved/loves, the Waterson/Carthy clan,
so Eliza was most welcome in the audience from Ms. Seeger's perspective.

A song was dedicated during the performance (an encore?)
to the memory of Norma Waterson, as per Peggy Seeger's intro.
Thus, Eliza began to sing along with Peggy, from the audience.
(This was 13 March I believe.)

How was it that Eliza, as she later Tweeted,
"dissolved in tears and had to remove myself before the end"?

Simple:
the audience member seated next to Eliza interrupted her singing along with Peggy Seeger,
to admonish Eliza, saying that she herself had "come to hear Peggy [sing]".

It was, as Eliza tweeted, "first night out to a concert in a very long time," which surely coincides with the final illness, passing away, and memorial/funeral of/for Norma Waterson recently.
Eliza added in a later Tweet,
"It wasn't a prestige thing for me to be there,
those people are my family and I really needed to be with them last night, magnetically.
Need. Peggy Seeger is another mum to me and I needed her."

Enough said ... your turn.