It seems that only yesterday Miley Cyrus was parading around on stage semi-naked whilst seductively licking inanimate objects. But that was in 2013, and to say that a lot has changed since then would be quite the understatement.

The singer, who turned 25 years old today, has been the focus of much less controversy over the past few years, something which many fans have attributed to her rekindled relationship with 27-year-old Australian actor, Liam Hemsworth.

Cyrus met Hemsworth in 2010 when they starred together in The Last Song. Their rocky relationship was the center of much media interest, especially when a 20-year-old Cyrus announced that they were engaged in 2012.

However, the following year they publicly ended their engagement to focus on their careers.

Cyrus shook up the music industry with her provocative performances (who can forget the foam finger incident?!), while Hemsworth channeled his energy into The Hunger Games franchise.

Despite their separation, Hemsworth maintained that they would “always be best friends” because of their “powerful connection.”

So it came as no surprise when the couple secretly rekindled their romance last year, with Cyrus once again wearing her engagement ring. But now fans think that the couple may be hiding something else…