and did he give any guest appearance anywhere?
Yes.
Davey Havok
Havok has appeared as a guest vocalist on releases from various other bands, 
what is kill for candy? It is a song. who sang it? Dreamcar. is it an album or band? Dreamcar is an American rock band. can you name some of its members? Adrian Young and Tom Dumont. what are their roles in the band? The former was the drummer and the latter was the guitarist. when was the above song released? March 2nd, 2017. where was it recorded? UNANSWERABLE was it live performed anywhere? Yes, the 'Jimmy Kimmel Live' show. how was its set? UNANSWERABLE where did the live show take place? The Hollywood Masonic Temple. what is the genre of the above band? Rock band. who sang the aforementioned song? Davey Havok. did the above former member worked in any other band or album? Yes, a band called AFI. who formed this band? Davey Havok, Mark Stopholese and Vic Chalker. can you mention any song or album of it? Albums - Answer That and Stay Fashionable and Very Proud of Ya. has the first member of this band been into fashion or modeling? Yes. can you mention one of its instance? Tarina Tarantino's jewelry line.
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Davey Havok [SEP] Guest appearances
Havok has appeared as a guest vocalist on releases from various other bands, including: