Nayeon usually is the default start to like 90% of Twice songs. More specifically the Korean ones, so whenever a different Twice member starts a song, the fans always make a note of it. So, other than Nayeon, who has started Twice songs the most? And, I'm counting who sings solo fully first.
Korean Songs
Like Ooh Ahh - Nayeon Start
Cheer Up - Nayeon Start
TT - Nayeon Start
Knock Knock - Nayeon Start
Signal - Dahyun Start
Likey - Sana Start
Merry Happy - Tzuyu Start
Heart Shaker - Chaeyoung Start
What is Love? - Nayeon Start (It sounds like Chaeyoung says Twice and What is Love, but Nayeon says the first full verse.)
DTNA - Nayeon Start
Yes or Yes - Mina Start Technically (But Tzuyu sings the first notes.)
TBTIED - Nayeon Start
Fancy - Nayeon Start
Feel Special - Chaeyoung Start
More & More - Nayeon Start
ICSM - Nayeon Start
Alcohol Free - Nayeon Start
Japanese Songs
One More Time - Nayeon Start
Candy Pop - Nayeon Start
Wake Me Up - Nayeon Start
BDZ - Tzuyu Start
Happy Happy - Technically Jihyo Start
Breakthrough - Jeongyeon Start
Fake and True - Mina Start Technically (But Dahyun speaks the first words.)
Fanfare - Mina Start (Nayeon sings the first note though.)
Better - Nayeon Start
Kura Kura -...Nayeon/Mina (Nayeon sings the first notes but Mina first line.....) Start
Perfect World - Jeongyeon Start
| Member | Korean | Japanese | Total |
| Nayeon | 11/17 | 5.5/11 | 16.5/28 |
| Jeongyeon | 0/17 | 2/11 | 2/28 |
| Momo | 0/17 | 0/11 | 0/28 |
| Sana | 1/17 | 0/11 | 1/28 |
| Jihyo | 0/17 | 1/11 | 1/28 |
| Mina | 1/17 | 2.5/28 | 3.5/28 |
| Dahyun | 1/17 | 0/11 | 1/28 |
| Chaeyoung | 2/17 | 0/11 | 2/28 |
| Tzuyu | 1/17 | 0/11 | 1/28 |
And why did I do this?...
No reason really, lmao. Just curious. 
It doesn't really matter who starts the songs, and Nayeon starts are iconic and we all know why she starts most of them. Still interesting to look at just because I'm curious. Do all groups start songs with the same member like this? I wonder. 
She captures 
