Billie Eilish

Used in some live performances at gigs and festivals in 2018

Bille is seen adjusting the Neumann TLM 103 on the first clip of this video.

According to sE Electronics' website, Eilish uses the V7 MC1 live.

Billie's vocals for 'Ocean Eyes' were recorded with the 2020, which sounds great. It's not quite as good as the Neumann, but I have never found a microphone that I like more than the 2020 that's less expensive than the Neumann. The 2020 is a really good starter microphone.

(Finneas O'Connell (Billie's brother, producer & co-writer) in Sound On Sound magazine)

Billie is shown here using the SM58, as mentioned. She used it for all of her live songs for 3FM.

FOH Engineer says "For microphones, we’ve been jumping between the [Shure] ULX-D..."

Her brother's using it in the video while he's producing Billie's new song called "come out and play" in his bedroom.

Her brother used it while performing "bellyache" at the Vevo LIFT Live Sessions.

Fender tweeted about the custom ukulele that Billie eilish got

At 0:45 Billie's brother mentions his use of Logic. You can also see it pretty much throughout the video.

Her brother uses it very often while Billie and him are performing.

Her brother is playing the keyboard while they're performing on Adult Swim.

Her brother (and producer) uses it in his bedroom studio to produce music for Billie.