The 'We Can't Stop' singer made a surprise appearance at Mike Will Made It's set at SXSW on Thursday night (19 March).
Clad in her usual skimpy Miley attire, this time with a military theme, she joined her producer pal to help close his set.
If she was at all bothered about the Patrick claims, she wasn't showing it…
Earlier this week, images emerged of Patrick with his arm around another girl, although he was quick to deny anything had happened.
He tweeted: "Omg. It's one of my best friend's girlfriend. Would NEVER do anything against my GF. Girls have guy friends and guys have friends that are girls."
Miley has been dating Patrick – the son of Arnold – since last year.She was previously engaged to Hunger Games star Liam Hemsworth.
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