Just like how Kendall had all planned out, Harry celebrates his 20th birthday with the KUWTK reality star at her father Bruce Jenner's Malibu mansion, as the One Direction singer's cousin reveals something about Styles's dating history.

"Kendall was really keen to make Harry's birthday a memorable one," a source said. "Her dad Bruce owns an incredible clifftop holiday home in California which has amazing views."

"The secluded house is perfect for them to spend quality time together," the source added. "It's also ideal for a party with Kendall's sisters."

Harry Styles took Twitter to respond to his birthday vacation. "Just saw donations to @believeinmagicx for my birthday," he tweeted. "Thank you.. You're all very kind and nice. xx."

In addition, Styles's cousin Ben Selley, who has grown up with him, has spoken out about the Midnight Memories singer's reputation. "It's Harry who is the one getting dumped," he said. "Harry is not a horrible guy in romance. He's not a dumper, he's a dumpee!

"He's got the biggest heart so the guy wouldn't have the guts to dump a girl," he continued. "He's too nice."

The British boybander was previously linked to Taylor Swift, Cara Delevingne, as well as older women including Caroline Flack and DJ Lucy Horobin.

"When he started with older women, I was shocked in a way, but he has always been a Romeo," Selley added. "I don't think the whole age thing really matters to Harry."

When he was asked about Styles's relationship with Jenner, the cousin said he was unsure whether they were just friends or more, and it was difficult for the singer to find a normal girl whom he knows wants him for him.