With September comes fall and its chilly weather. It also usually brings an end to most celebrity summer flings. 2015 saw several young celebrities hook-up and break-up during the summer, and some even made it to September.

The list famously includes Taylor Swift and Calvin Harris, who reportedly started seeing each other in March but only confirmed their relationship in later months.

Joining Swift and Harris on date were Gigi Hadid and Joe Jonas, who kept on dodging questions about their relationship status until they were finally photographed holding hands.

Fans had high hopes for Austin Mahone and Becky G's supposed "real" relationship. Unfortunately, they ended things in August.

There were also rumors of a romance between Ed Sheeran and Nicole Scherzinger but the former Pussycat Dolls member's reps reportedly denied the speculations.

Meanwhile, Nina Dobrev stirred up her fandom when she started dating the "Whiplash" actor Austin Stowell in July. They have been packing on the PDA in plain sight of everyone.

Check out the gallery to see 5 of the famed celebrity summer flings of 2015!