I have to agree, this girl does have a talent................ A talent for copying Ellie Golding 
who copied elton john 
most singers dont right there own stuff i.e. riannah love the way you lie was written by a girl called skylar grey and was written for herself to sing then riannah actually did a cover of.
thats just to name one artist off the top of my head.
A couple of things; Ellie Goulding did not 'copy' Elton John, she covered his song, big difference. But there's little chance this Janet Devlin will have even known the song until Ellie Goulding covered the song and it was used in an advert (I know I didn't, yet I'm blessed to have been brought up in an Elton-free environment

)
And the fact Janet Devlin sings the same song in such a similar style to Ellie's version, to me, seems like Janet copied Ellie.
Not that there's much wrong with that in the fickle world of pop music, everyone's copying what's 'in' as that's where the gwap is.
If it gets her her 15 minutes of fame, all power to her!
And as for 'most singers dont right [sic] there [sic] own stuff', this is very wrong.
So many artists write their own material, unless they are (again) in the fickle world of pop music, which I'll give you the benefit of the doubt and assume you were referring to 'pop' 'singers'.
*Apologies for being pedantic, I'm very opinionated when it comes to music and also in a bit of a dodgy mood at the moment