ales ▁– ▁guitar ▁solo ▁on ▁" Last ▁Day ▁of ▁My ▁Life " ▁and ▁" Don ' t ▁Go " ▁ ▁George ▁Mar ino ▁– ▁master ing ▁ ▁Jon ▁Math ias ▁– ▁engineer , ▁mixing ▁ ▁Gar th ▁M iche al ▁– ▁assistant ▁engineer ▁ ▁Matt ▁Nelson ▁– ▁bass ▁ ▁Vic ▁Pe pe ▁– ▁ac oust ic ▁guitar , ▁electric ▁guitar , ▁producer , ▁arrang ements ▁ ▁Brian ▁Perry ▁– ▁bass ▁ ▁D oro ▁P esch ▁– ▁vocals , ▁arrang ements ▁ ▁Jack ▁Pont i ▁– ▁electric ▁guitar , ▁bass , ▁key boards , ▁producer , ▁arrang ements , ▁mixing , ▁backing ▁vocals ▁ ▁Ryan ▁Ro x ie ▁– ▁electric ▁guitar ▁ ▁Barry ▁Ste iman ▁– ▁assistant ▁engineer ▁ ▁References ▁ ▁External ▁links ▁ ▁American ▁site ▁ ▁" Last ▁Day ▁of ▁My ▁Life " ▁video ▁clip ▁ ▁" Bad ▁Blood " ▁video ▁clip ▁ ▁Category : D oro ▁( mus ician ) ▁albums ▁Category : 1 9 9 3 ▁albums ▁Category : Vert igo ▁Records ▁albums <0x0A> </s> ▁T win ▁cities ▁are ▁a ▁special ▁case ▁of ▁two ▁cities ▁or ▁urban ▁cent res ▁that ▁are ▁founded ▁in ▁close ▁ge ographic ▁proxim ity ▁and ▁then ▁grow ▁into ▁each ▁other ▁over ▁time , ▁losing ▁most ▁of ▁their ▁mut ual ▁buffer ▁zone . ▁ ▁There ▁are ▁no ▁precise ▁criteria ▁for ▁tw in - city hood , ▁but ▁to ▁be ▁considered ▁tw in ▁cities , ▁the ▁cities ▁involved ▁have ▁to ▁have ▁a ▁similar ▁administrative ▁status ▁and ▁somewhat ▁compar able ▁sizes ; ▁a ▁sub urb ▁of ▁a ▁much ▁larger ▁population