Many people make the common mistake of selecting foundation shades based solely on their facial skin, which can result in a mismatch. From my experience, the color of your neck and arms often better reflect your overall skin tone, especially when blending foundation on your face. Tara Sigari's method of using the neck and arm as reference points helps avoid the pink undertone issue I faced before. When choosing foundations, it's important to test shades in natural light and apply them to your neck or jawline to see how well they blend. Tara’s use of the HD Skin Hydro Glow foundation in a pink cool undertone and the neutral option from Kylie Cosmetics demonstrates the difference undertones can make. The pink literally disappears when matched correctly, confirming a true undertone match. I also found that neutral undertones are most versatile and can suit a broader range of skin tones. For beginners, following Tara’s advice and using these products can simplify the foundation selection process and result in flawless makeup application every time.