According to a source, the "Bad blood" hitmaker was "completely shocked" and couldn't trust Kendall anymore, reports hollywoodlife.com.
"Taylor heard from a mutual friend that Harry and Kendall are back together and she is completely shocked. She can't believe that Kendall would actually date Harry," the source said.
Both Swift and Kendall got close to each other as they had previously dated the One Direction singer.
"The fact that Harry and Kendall are celebrating New Year's eve together is beyond weird to Taylor. She really can't trust anything that Kendall tells her, not now that she's back with Harry,” the source added.
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