Ranked Teams question?

So I just want to know if the following can happen? - Lets say you are Silver V in SoloQ, but unranked in 3v3/5v5. Is it possible to receive the Sivir skin when one of yours friends existing teams (gold lll) invites you to their team roster??? And at the end of the season you are part of their (gold lll) team??? Any help will be appreciated :D Thank You :)
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