Article continues below advertisementKaty Perry and Justin Trudeau's unexpected budding romance has the pop star's pals worried.According to an insider, the singer's inner circle is concerned she may be moving too fast, as after the two first sparked dating rumors while on a Tuesday, July 29, dinner date, the former Canada prime minister attended her July 30 concert.Article continues below advertisementJustin Trudeau's 'Womanizer' Reputation Concerns Katy Perry's FriendsSource: megaAn insider claimed Katy Perry's friends want her to 'slow' down with Justin Trudeau.